League | State(s) | Designation(s) | Years |
Alabama–Florida League | Alabama, Florida | Class D | 1936–1939, 1951–1962 |
Alabama–Mississippi League | Alabama, Mississippi | Class D | 1936 |
Alabama State League | Alabama | Class D | 1940–1941, 1956–1950 |
Alabama–Tennessee League | Alabama, Tennessee | Class D | 1921 |
All-American Association | Alabama, Louisiana, Tennessee, Texas | Independent | 2001 |
American Association | Colorado, Indiana, Iowa, Kansas, Kentucky, Louisiana, Minnesota, Missouri, Nebraska, New York, Ohio, Oklahoma, Texas, West Virginia, Wisconsin | Class A (1903–1911) Class AA (1912–1945) Class AAA (1946–1962, 1969–1997) | 1902–1962, 1969–1997 |
Anthracite League | Pennsylvania | Class D | 1928 |
Appalachian League | Tennessee, North Carolina, Virginia, West Virginia | Class D (1911–1914, 1921–1925, 1937–1955, 1957–1962) Rookie (1963–2020) | 1911–1914, 1921–1925, 1937–1955, 1957–2020. |
Arizona Instructional League | Arizona | Winter Rookie | 1960–1991 |
Arizona League | Arizona | Independent | 1897 |
Arizona–Mexico League | Arizona, Mexico | Class C | 1955–1958 |
Arizona–Mexico League II | Arizona, Mexico | Independent | 2003 |
Arizona Rookie League | Arizona | Winter Rookie | 1964 |
Arizona State League | Arizona | Class D | 1928–1930 |
Arizona–Texas League | Arizona, Texas | Class D (1931–1932, 1937–1939) Class C (1940–1941, 1947–1950, 1952–1954) | 1931–1932, 1937–1941, 1947–1950, 1952–1954 |
Arkansas–Louisiana–Texas League | Arkansas, Louisiana, Texas | Negro minor | 1951 |
Arkansas–Missouri League | Arkansas, Missouri | Class D | 1936–1940 |
Arkansas State League | Arkansas, Louisiana, Missouri, Texas | Class D | 1893, 1897, 1908–1909, 1934–1935 |
Arkansas–Texas League | Arkansas, Texas | Class D | 1906 |
Atlantic Association | Connecticut, Delaware, Massachusetts, Maine, Maryland, New Jersey, Pennsylvania, Rhode Island, Washington, D.C. | Independent (1889–1890) Class D (1908) | 1889–1890, 1908 |
Atlantic Coast League | North Carolina, South Carolina | Independent | 1995 |
Atlantic League I | Connecticut, Delaware, New Jersey, New York, Pennsylvania, Virginia | Class A (1896, 1899) Class B (1897–1898) | 1895–1900, 1905, 1907-1909 |
Atlantic League II | Connecticut, New Jersey, New York | Class D | 1914–1915 |
Basin League | Nebraska, South Dakota | Independent | 1953–1959 |
Beaver Valley League | Pennsylvania | Independent | 1894 |
Bi-State League I | Illinois, Wisconsin | Class D | 1915 |
Bi-State League II | North Carolina, Virginia | Class D | 1934–1942 |
Big South League | Arkansas, Mississippi, Tennessee | Independent | 1996–1997 |
Big State League | Texas | Class B | 1947–1957 |
Black Hills League | Nebraska, South Dakota | Independent | 1891–1892 |
Blue Grass League | Kentucky | Class D | 1892, 1896, 1908–1912, 1922–1924 |
Blue Mountain League | Pennsylvania | Independent | 1907 |
Blue Ridge League I | Maryland, Pennsylvania, West Virginia | Class D | 1915–1918, 1920–1930 |
Blue Ridge League II | North Carolina, Virginia | Class D | 1946–1950 |
Border League I | Michigan, Ontario | Class D | 1912–1913 |
Border League II | New York, Ontario, Quebec | Class C | 1946–1951 |
Buckeye League | Ohio | Class D | 1915 |
California Fall League | California | Winter Rookie | 1998 |
California League I | California | Class B (1892) Class D (1898) Class E (1899) | 1879–1893, 1896–1897, 1900–1902, 1906–1909 |
California Players League | California | Independent | 1894 |
California State League | California | Class D | 1883, 1885–1886, 1888, 1903–1906, 1910, 1912–1915, 1928–1929 |
California Winter League I | California | Winter League | 1928–1947 |
Can–Am League | New Jersey, New York, Quebec, Ontario | Independent | 2005–2019 |
Canadian Association | Canada | Independent | 1895 |
Canadian Baseball League | Canada | Independent | 2003 |
Canadian League | Ontario, Pennsylvania | Independent Class D (1899) | 1885–1886, 1893–1894, 1896–1898 |
Canadian Midland League | Canada | Independent | 1894 |
Canadian–American League I | Massachusetts, New York, Ontario | Class C | 1936–1942, 1946–1951 |
Canadian–American League II | Ontario | Independent | 1959 |
Canal Zone League | Panama | Winter Rookie | 1948–1950 |
Cape Breton Colliery League | Nova Scotia | Class D (1937–1938) Class C (1939) | 1937–1939 |
Carolina Association | North Carolina, South Carolina | Class D | 1908–1912 |
Carolina Baseball League | North Carolina | Independent | 1936–1938 |
Carolina Interstate League | North Carolina, South Carolina | Independent | 1904 |
Carolina Textile League | North Carolina | Independent | 1935 |
Central Association I | Illinois, Iowa, Missouri, Wisconsin | Class D | 1908–1917 |
Central Association II | Illinois, Iowa, Missouri | Class C | 1947–1949 |
Central Atlantic League | | Independent | 1888 |
Central Baseball League | Louisiana, Missouri, Texas | Independent | 2002–2005 |
Central California League | California | Class D | 1896, 1910–1911 |
Central Connecticut League | Connecticut | Independent | 1892, 1910–1911 |
Central International League | Manitoba, Minnesota, North Dakota, Wisconsin | Class C | 1912 |
Central Interstate League | Illinois, Indiana, Iowa | Independent | 1887–1890 |
Central Kansas League | Kansas | Class D | 1908–1912 |
Central League I | New Jersey, New York, Pennsylvania | Independent | 1888 |
Central League II | Illinois, Indiana, Kentucky, Pennsylvania | Class C | 1897 |
Central League III | Illinois, Indiana, Michigan, Ohio, Pennsylvania, West Virginia | Class B | 1900, 1903–1917, 1920–1922, 1926, 1928–1930, 1932, 1934 |
Central League IV | Indiana, Michigan, Ohio, West Virginia | Class A | 1948–1951 |
Central Mexican League | Mexico | Class C | 1955–1957 |
Central Nebraska League | Nebraska | Independent | 1903 |
Central New Jersey League | New Jersey | Independent | 1891–1892 |
Central New York League | New York | Independent | 1888, 1910 |
Central Pennsylvania League | Pennsylvania | Independent (1886–1888, 1896, 1898) Class F (1897) | 1886–1888, 1896–1898 |
Central Texas League | Texas | Class D | 1914–1917 |
Chicago City League | Illinois | Independent | 1887, 1890, 1892–1894, 1909–1910 |
Citrus League | Florida | Spring | 1972 |
Coastal Plain League | North Carolina | Class D | 1937–1941, 1946–1952 |
Cocoa Rookie League | Florida | Rookie | 1964 |
Colonial League I | Connecticut, Massachusetts, Rhode Island | Class C | 1914–1915 |
Colonial League II | Connecticut, New Jersey, New York | Class B | 1947–1950 |
Colorado State League | Colorado | Independent | 1885, 1889–1891, 1894–1896, 1898 |
Connecticut Association | Connecticut | Class D | 1910 |
Connecticut League/Connecticut State League | Connecticut | Class E (1891) Class B (1894, 1905–1912) Class F (1897–1901) | 1884–1885, 1888, 1891, 1894–1895, 1897–1912 |
Continental Baseball League | Louisiana, New Mexico, Texas | Independent | 2007–2010 |
Copper Country Soo League | Michigan | Class D | 1904–1905 |
Cotton States League I | Alabama, Arkansas, Florida, Louisiana, Mississippi | Class D | 1902–1914 |
Cotton States League II | Arkansas, Louisiana, Mississippi, Texas | Class D | 1919–1932 |
Cotton States League III | Arkansas, Louisiana, Mississippi, Texas | Class C | 1936–1941, 1947–1955 |
Cumberland Valley League | Maryland, Pennsylvania | Independent | 1896 |
Dakota League | North Dakota, South Dakota | Class D | 1921–1922 |
Dawson League | Yukon | Independent | 1904 |
Delaware State League | Delaware | Independent | 1889 |
Delta League | Mississippi | Class D | 1904–1905 |
Dixie Association | Alabama, Arkansas, Florida, Georgia, Louisiana, New Mexico, North Carolina, Tennessee, Texas | Class AA | 1971 |
Dixie League I | Alabama, Georgia | Class D | 1916–1917 |
Dixie League II | Arkansas, Louisiana, Mississippi, Texas | Class C | 1933 |
East Dixie League | Arkansas , Louisiana, Mississippi | Class C | 1934–1935 |
East Texas League | Texas | Class D (1916, 1923–1926, 1931) Class C (1936–1940, 1946, 1949–1950) | 1916, 1923–1926, 1931, 1936–1940, 1946, 1949–1950 |
East Texas Negro League | Louisiana, Texas | Negro minor | 1946 |
Eastern Association | Connecticut, Massachusetts, New York, Pennsylvania, Rhode Island | Independent (1882, 1901, 1909) Class B (1913–1914) | 1882, 1901, 1909, 1913–1914 |
Eastern Canada League | Ontario, Quebec | Class B | 1922–1923 |
Eastern Carolina Baseball Association | North Carolina | Independent | 1920–1922 |
Eastern Carolina League | North Carolina | Class D | 1908–1910, 1928–1929 |
Eastern Championship Association | New York, Pennsylvania, Washington D.C. | Independent | 1881 |
Eastern Illinois League | Illinois, Indiana | Class D | 1907–1908 |
Eastern Interstate League | Illinois, Pennsylvania | Independent | 1888, 1890, 1895 |
Eastern Iowa League | Illinois, Iowa | Independent | 1905 |
Eastern Kansas League | Kansas | Class D | 1910–1911 |
Eastern League I | Delaware, Maryland, New Jersey, Pennsylvania, Virginia | Independent | 1884–1887 |
Eastern League II | Connecticut, Maine, Massachusetts, New York, Pennsylvania, Rhode Island, Virginia | Class B (1916–1916) Class A (1919, 1932) | 1916–1919, 1932 |
Eastern New England League | Maine, Massachusetts | Independent | 1885 |
Eastern Shore League | Delaware, Maryland, Virginia | Class D | 1922–1928, 1937–1941, 1946–1949 |
Empire State League | Georgia, New York | Independent (1887) Class D (1913) | 1887, 1913 |
Empire State League (1987) | New York | Independent | 1987 |
Empire State League (1905–1907) | New York | Independent 1905–1907 | 1905–1907 |
Evangeline Baseball League | Louisiana, Mississippi, Texas | Class D (1934–1942, 1946–1948) Class C (1949–1957) | 1934-1942, 1946–1957 |
Far West League | California, Oregon, Nevada | Class D | 1948–1951 |
Federal League | Illinois, Indiana, Kentucky, Missouri, Ohio, Pennsylvania | Independent | 1913 |
Florida–Alabama–Georgia League | Alabama, Florida, Georgia | Class D | 1915 |
Florida East Coast Instructional League | Florida | Winter Rookie | 1964 |
Florida East Coast League | Florida | Class D (1946–1948) Rookie (1949–1954) | 1946–1954 |
Florida Instructional League | Florida | Winter Rookie | 1958–2007 |
Florida Instructional League North | Florida | Winter Rookie | 1969 |
Florida Instructional League South | Florida | Winter Rookie | 1969 |
Florida International League | Cuba, Florida | Class C (1946–1948) Class B (1949–1954) | 1946–1954 |
Florida Winter League | Florida | Winter | 1960–1961 |
Geauga County League | Ohio | Independent | 1905 |
Georgia State League | Georgia | Class D | 1906, 1914, 1920–1921, 1948–1956 |
Georgia–Alabama League | Alabama, Georgia, New York | Class D | 1913–1917, 1928–1930, 1946–1951 |
Georgia–Florida League | Florida, Georgia, | Class D (1935–1942, 1946–1958, 1962) Class A (1963) | 1935–1942, 1946–1958, 1962–1963 |
Great Central League | Illinois, Indiana, Iowa, Minnesota | Independent | 1994 |
Gulf League | Alabama, Louisiana | Independent | 1886 |
Gulf States League | Louisiana, Texas | Class A | 1976 |
Hawaii Winter Baseball | Hawaii | Winter Independent | 1993–2008 |
Hudson River League | Massachusetts, New York | Class D (1903) Class C (1904–1907) | 1903–1907 |
Illinois–Indiana League | Illinois, Indiana | Independent | 1889, 1892 |
Illinois–Indiana–Iowa League (Three-I) | Illinois, Indiana, Iowa, Minnesota, Wisconsin | Class D (1901) Class B (1902–1917, 1919–1932, 1935, 1937–1942, 1946–1961) | 1901–1917, 1919–1932, 1935, 1937–1942, 1946–1961 |
Illinois–Iowa League | Indiana, Illinois, Iowa | Independent | 1890–1892 |
Illinois State League | Illinois | Class D | 1947–1948 |
Illinois–Missouri League | Illinois, Missouri | Class D | 1908–1914 |
Independent Negro League | Georgia, Louisiana, Maryland, Missouri, Tennessee, New Jersey, New York, Ohio, Pennsylvania, Texas, Washington D.C. | Independent | 1914–1950 |
Independent Northern League | New York, Ontario | Independent | 1906 |
Indiana–Michigan League | Indiana, Michigan | Class D | 1921 |
Indiana-Ohio League | Indiana, Ohio | Class D | 1908 |
Indiana State League | Indiana | Independent | 1889, 1890, 1900 |
Inland Empire League | Oregon, Washington | Class D | 1902, 1908 |
Inter-American League | Florida, Dominican Republic, Panama, Puerto Rico, Venezuela | Class AAA | 1979 |
International Association for Professional Base Ball Players | Ohio, Ontario, New Hampshire, New York, Massachusetts, Michigan, New Jersey | Independent | 1877–1880, 1888–1900 |
International League of Independent Professional Base Ball Clubs | Cuba, Delaware, New Jersey, Pennsylvania | Independent | 1906 |
Interstate Association | Indiana, Michigan, Ohio | Class C | 1906 |
Interstate League | Indiana, Kentucky, Michigan, Ohio, Pennsylvania, New Jersey, New York, West Virginia | Independent (1896–1901) Class C (1913) Class D (1905–1908, 1914–1916, 1932) | 1896–1901, 1905–1908, 1913–1916, 1932 |
Iowa State League | Illinois, Iowa | Class D | 1904–1907, 1912 |
Iowa–South Dakota League | Iowa, South Dakota | Class D | 1902–1903 |
Iron & Oil Association | Ohio, Pennsylvania | Independent | 1884 |
Iron & Oil League | New York, Ohio, Pennsylvania, West Virginia | Independent (1885, 1892) Class F (1898) Class C (1895) | 1885, 1892, 1895, 1898 |
Kansas State League | Kansas, Oklahoma | Independent (1887, 1895–1898) Class D (1905–1906, 1909–1911, 1913–1914) | 1887, 1895–1898, 1905–1906, 1909–1911, 1913–1914 |
Kansas–Oklahoma–Missouri League (KOM) | Kansas, Missouri, Oklahoma | Class D | 1946–1952 |
Kentucky–Indiana League | Indiana, Kentucky | Independent | 1896 |
Kentucky–Illinois–Tennessee League (KITTY) | Illinois, Indiana, Kentucky, Tennessee | Class D | 1903–1906, 1910–1914, 1916, 1922–1924, 1933–1942, 1946–1955 |
Keystone Association | Pennsylvania | Independent | 1884–1885 |
League Alliance | Eastern United States | Semi-affiliated | 1877, 1882 |
Lone Star League | Texas | Class D (1927–1929) Class C (1947–1949) Class A (1977) | 1927–1929, 1947–1949, 1977 |
Longhorn League | Texas | Class C | 1947–1955 |
Louisiana State Baseball League | Louisiana | Independent (1915) Class D (1920) | 1915, 1920 |
Maine State League | Maine, New Hampshire | Independent (1887) Class D (1907–1908) | 1887, 1907–1908 |
Manitoba-Dakota League (MANDAK) | Manitoba, North Dakota | Independent | 1950–1957 |
Maryland Fall Baseball | Maryland | Fall | 1998 |
Massachusetts-Connecticut League | Connecticut, Massachusetts | Class D | 1912 |
Michigan State League | Michigan | Independent (1889–1890, 1895) Class D (1902, 1911–1914) Class C (1926, 1940–1941) | 1889–1890, 1895, 1902, 1911–1914, 1926, 1940–1941 |
Michigan–Ontario League | Michigan, Ontario | Class B | 1919–1926 |
Middle Atlantic League | Maryland, Ohio, New York, Pennsylvania, West Virginia | Class C | 1925–1942, 1946–1951 |
Middle States League | Connecticut, Delaware, New Jersey, Pennsylvania | Independent | 1889 |
Middle Texas League | Texas | Class D | 1914–1915 |
Midwest League | Illinois, Indiana, Iowa, Kentucky, Michigan, Ohio, Wisconsin | Class D (1956–1962) Class A (1963–2020) | 1956–2020 |
Minnesota–Wisconsin League | Minnesota, Wisconsin | Class C (1911) Class D (1909–1910, 1912) | 1909–1912 |
Mississippi State League | Mississippi | Class D | 1924 |
Mississippi Valley League | Illinois, Iowa | Class D (1922–1932) Class B (1933) | 1922–1933 |
Mississippi–Ohio Valley League | Illinois, Indiana, Iowa, Kentucky, Missouri | Class D | 1949–1955 |
Missouri-Iowa-Nebraska-Kansas League (MINK) | Iowa, Kansas, Missouri, Nebraska | Class D | 1910–1913 |
Missouri State League | Missouri | Independent (1896) Class D (1911) | 1896, 1911 |
Missouri Valley League | Arkansas, Kansas, Missouri, Oklahoma | Independent (1901) Class D (1902–1903) Class C (1904–1905) | 1901–1905 |
Monongahela League | Pennsylvania | Independent | 1894 |
Montana State League | Idaho, Montana, Utah | Independent | 1892, 1900, 1909 |
Mountain State League | Kentucky, West Virginia | Class D (1936–1941) Class C (1942) | 1936–1942 |
Mountain States League I | Kentucky, Ohio, West Virginia | Class D | 1911–1912 |
Mountain States League II | Kentucky, Tennessee, Virginia | Class D (1948–1952) Class C (1953–1954) | 1948–1954 |
Naugatuck Valley League | Connecticut | Independent | 1896 |
National Association | Massachusetts, New Hampshire, New York, Pennsylvania, Washington D.C. | Independent | 1879–1880 |
National Association of Colored Baseball Clubs of the United States and Cuba | Cuba, New York, Pennsylvania | Negro minor | 1907–1910 |
National Colored Base Ball League | Kentucky, Maryland, Massachusetts, New York, Ohio, Pennsylvania, Washington D.C. | Negro minor | 1887 |
Nebraska State League | Iowa, Kansas, Nebraska, South Dakota | Class B (1892) Class D (1910–1915, 1922–1923, 1928–1938, 1956–1959) | 1892, 1910–1915, 1922–1923, 1928–1938, 1956–1959 |
Negro American Association | Georgia, Maryland, North Carolina, Pennsylvania, South Carolina, Virginia | Negro minor | 1939, 1948–1949 |
Negro National Baseball Association | North Carolina, Virginia | Negro minor | 1954 |
Negro Southeastern League | Alabama, Georgia | Negro minor | 1921 |
Negro Southern League I | Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Ohio, Tennessee | Negro minor | 1920–1931, 1933–1936 |
Negro Southern League II | Alabama, Arkansas, Florida, Georgia, Indiana, North Carolina, Tennessee | Negro minor | 1945–1951 |
Negro Texas League | Alabama, Arkansas, Louisiana, Texas | Negro minor | 1949 |
Nevada State League | Nevada | Independent | 1907 |
New Brunswick-Maine League | Maine, New Brunswick | Class D | 1913 |
New California League | California | Independent | 1881 |
New England Association | Massachusetts, New Hampshire, Rhode Island | Independent | 1877, 1895 |
New England League | Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island | Independent (1877, 1886–1888, 1891, 1893, 1894–1898, 1901) Class F (1899) Class B (1892, 1902–1915, 1919, 1926–1930, 1933, 1946–1949) | 1877, 1886–1888, 1891–1899, 1901–1915, 1919, 1926–1930, 1933, 1946–1949 |
New Hampshire State League | New Hampshire, New York, Vermont | Independent (1885–1886, 1895) Class D (1907) | 1885–1886, 1895, 1907 |
New Jersey State League | New Jersey | Class D | 1897 |
New Pacific League | British Columbia, Oregon, Washington | Class C | 1896 |
New York–New Jersey League | Connecticut, New Jersey, New York | Class D | 1913 |
New York–Pennsylvania League | New York, Pennsylvania | Class D (1923–1932) Class A (1933–1937) | 1923–1937 |
New York–Penn League | Connecticut, Maryland, Massachusetts, New York, Ohio, Ontario, Pennsylvania, Vermont, West Virginia | Class A | 1939–2020 |
New York State League | New York, Pennsylvania | Independent (1885, 1889–1890, 1898) Class B (1894–1895, 1902–1917) Class D (1897, 1899–1901 ) | 1885, 1894–1895, 1897–1917 |
North Atlantic League | Massachusetts, New Hampshire, New Jersey, New York, Ontario, Pennsylvania | Class D (1946–1950) Independent (1995–1996) | 1946–1950, 1995–1996 |
North Carolina State League | North Carolina | Class D | 1913–1917, 1937–1953 |
North Dakota League | North Dakota | Class D | 1923 |
North Texas League | Arkansas, Texas | Class D | 1905, 1907 |
Northeast Arkansas League | Arkansas | Class D | 1909–1911, 1936–1941 |
Northeast League | Maine, Massachusetts, New Jersey, Pennsylvania, Rhode Island | Independent | 1995–1998, 2003–2004 |
Northeastern League | Connecticut, Massachusetts, New Hampshire, New York, Vermont | Independent (1887, 1895–1896) Class B (1934) | 1887, 1895–1896, 1934 |
Northern-Copper Country League | Manitoba, Michigan, Minnesota, North Dakota | Class C (1906) Class D (1907) | 1906–1907 |
Northern Copper Country-Soo League | Manitoba, Michigan, Minnesota, North Dakota | Class D | 1905 |
Northern League | Manitoba, Michigan, Minnesota, North Dakota, Ontario, South Dakota, Wisconsin | Class D (1902–1905, 1908, 1917, 1933–1940) Class C 1941–1942, 1946–1962) Class A (1963–1971) | 1902–1905, 1908, 1913–1917, 1932–1942, 1932–1942, 1946–1971 |
Northern Maine League | Maine | Class D | 1909 |
Northern Michigan League | Michigan | Independent | 1887, 1895 |
Northern New York League | New York, Vermont | Class D (1902) Independent (1900–1901, 1903–1905) | 1900–1905 |
Northern State of Indiana League | Indiana | Class D | 1909–1911 |
Northern Utah League | Idaho, Utah | Class D | 1921 |
Northwest International League | British Columbia, Washington | Class B | 1919 |
Northwestern League I | Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, Wisconsin | Independent | 1883–1884, 1886–1887 |
Northwestern League II | British Columbia, Montana, Oregon, Washington | Class B | 1905–1917 |
Oahu League | Hawaii, | Independent | 1913 |
Ohio State League | Indiana, Kentucky, Michigan, Ohio, West Virginia | Independent (1887) Class D (1908–1916, 1936–1947) | 1887, 1908–1916, 1936–1947 |
Ohio–Indiana League | Indiana, Ohio | Class D | 1948–1951 |
Ohio–Pennsylvania League | Ohio, Pennsylvania, West Virginia | Class C (1905–1911) Class D (1912) | 1905–1912 |
Ohio Valley League | Ohio, | Independent | 1890, 1912, 1949 |
Oklahoma State League | Oklahoma | Class D | 1912, 1922–1924 |
Oklahoma–Arkansas–Kansas League | Arkansas, Kansas, Oklahoma | Class D | 1907 |
Oklahoma–Kansas League | Kansas, Oklahoma | Class D | 1908 |
Ontario–Quebec–Vermont League | Ontario, Quebec, Vermont | Class B | 1924 |
Oregon State League | Oregon, Washington (state) | Class D | 1904 |
Pacific Coast International League | British Columbia, Washington | Class B | 1918–1922 |
Pacific Interstate League | Oregon, Washington | Independent | 1891 |
Pacific League | California | Independent | 1878-1880 |
Pacific National League | California, Idaho, Montana, Oregon, Utah, Washington | Class A (1903) Class B (1904) Independent (1905) | 1903–1905 |
Pacific Northwest League | British Columbia, Montana, Oregon, Utah, Washington | Independent (1890–1892, 1896, 1898, 1901) Class B (1902) | 1890–1892, 1896, 1898, 1901–1902 |
Palmetto League | Georgia, South Carolina | Class D | 1931 |
Pan American Association | Unknown | Independent | 1960 |
Panhandle-Pecos Valley League | New Mexico, Texas | Class D | 1923 |
Peninsula Winter League | California | Rookie | 1959–1968 |
Pennsylvania League | Pennsylvania | Independent | 1903–1904 |
Pennsylvania–Ohio–Maryland League (POW) | Maryland, Ohio, Pennsylvania, West Virginia | Class D | 1908–1914 |
Pennsylvania–Ontario–New York League (PONY) | Ontario, Pennsylvania, New York | Class D | 1939–1956 |
Pennsylvania-New Jersey League | New Jersey, Pennsylvania | Independent | 1908 |
Pennsylvania State Association | Pennsylvania | Class D | 1934–1942 |
Pennsylvania State League | Pennsylvania | Independent | 1892–1895 |
Pennsylvania–West Virginia League | Pennsylvania, West Virginia | Class D | 1906–1907 |
Pennyrile League | Kentucky | Independent | 1896 |
Piedmont League | Maryland, North Carolina, Pennsylvania, South Carolina, Virginia | Class D (1920) Class C (1921–1931) Class B (1932–1955) | 1921–1955 |
Potomac League | Maryland, West Virginia | Class D | 1916 |
Prairie League | Manitoba, Minnesota, North Dakota, Saskatchewan, South Dakota, Wisconsin | Independent | 1995–1997 |
Provincial League (baseball) | Quebec, Vermont | Independent (1900, 1948–1949) Class C (1950–1955) | 1900, 1948–1955 |
Rio Grande Association | Arizona, New Mexico, Texas | Class D | 1915 |
Rio Grande Valley League | Texas | Class D (1931, 1949) Class C (1950) | 1931, 1949–1950 |
Rocky Mountain League | Colorado, New Mexico, Wyoming | Class D | 1912 |
San Francisco City League | California | Independent | 1896 |
San Joaquin Valley League | California | Class D (1910) Independent (1911) | 1910–1911 |
Sarasota Rookie League | Florida | Rookie | 1964 |
Sooner State League | Oklahoma, Texas | Class D | 1947–1957 |
Sophomore League | New Mexico, Texas | Class D | 1958–1961 |
South Carolina League | South Carolina | Class D | 1906–1908 |
South Central League | Arkansas, Oklahoma | Class D | 1906, 1912 |
South Coast League | Georgia, Florida, South Carolina | Independent | 2007 |
South Dakota League | Minnesota, North Dakota, South Dakota | Class D | 1920–1923 |
South New Jersey League | New Jersey | Independent (1895, 1897) Class D (1896) | 1895–1897 |
South Texas League | Texas | Class C | 1903–1906 |
Southeastern League | Alabama, Florida, Georgia, Louisiana, North Carolina, Tennessee | Class D (1910–1912) Class B (1926–1950) Independent (2002–2003) | 1910–1912, 1926–1950, 2002–2003 |
Southern Association | Alabama, Arkansas, Florida, Georgia, Indiana, Louisiana, South Carolina, Tennessee | Class B (1886, 1892–1896, 1898, 1901) Class C (1899) Class A (1902–1945) Class AA (1946–1961) | 1886, 1892–1896, 1898–1899, 1901–1961 |
Southern California League | California | Class D | 1913 |
Southern California Trolley League | California | Class D | 1910 |
Southern California Winter League | California | Winter | 1914, 1957 |
Southern Illinois League | Illinois | Independent (1895–1896) Class D (1910) | 1895–1896, 1910 |
Southern League of Colored Base Ballists | Alabama, Florida, Georgia, Louisiana, South Carolina, Tennessee | Negro minor | 1886 |
Southern Michigan League | Michigan | Class D (1906–1910) Class C (1911–1912) | 1906–1912 |
Southern New Hampshire League | New Hampshire | Class D | 1907 |
Southern Tier League | New York, Pennsylvania | Independent | 1904–1905 |
Southern Tri-State League | Alabama, Tennessee | Independent | 1905 |
Southwest International League | Arizona, California, Mexico, Nevada, Texas | Class C | 1948–1951 |
Southwest Iowa League | Iowa | Class D | 1903 |
Southwest Texas League | Texas | Class D (1910–1911) Independent (1936) | 1910–1911, 1936 |
Southwest Washington League | Washington | Class D | 1903–1906 |
Southwestern League | Arkansas, Kansas, Missouri, Oklahoma | Independent (1887, 1904) Class D (1921, 1924–1926) Class C (1922–1923) | 1887, 1904, 1921–1926 |
Southwestern Nebraska Baseball League | Nebraska | Independent | 1903 |
Sunset League | Arizona, California, Mexico, Nevada | Class C | 1947–1950 |
Tar Heel League | North Carolina | Class D | 1939–1940, 1953–1954 |
Tennessee–Alabama League | Alabama, Tennessee | Independent | 1903–1904 |
Texas Association | Texas | Class C (1896) Class D 1923–1926) | 1896, 1923–1926 |
Texas Colored League | Louisiana, Oklahoma, Texas | Negro minor | 1919–1921, 1923–1926 |
Texas–Louisiana Negro League | Louisiana, Texas | Negro minor | 1930–1931 |
Texas–Oklahoma–Louisiana League | Louisiana, Oklahoma, Texas | Negro minor | 1929 |
Texas–Oklahoma League | Oklahoma, Texas | Class D | 1911–1914, 1921–1922 |
Texas-Southern League | Louisiana, Texas | Class B (1895) Class C (1896–1899) | 1895–1899 |
Texas Valley League | Texas | Independent (1901–1908) Class D ( 1927–1928, 1938) | 1901–1908, 1927–1928, 1938 |
Tidewater League | North Carolina, Virginia | Class D | 1911 |
Tobacco State League | North Carolina | Class D | 1946–1950 |
Tri State League | Alabama, Florida, Louisiana, Mississippi | Negro minor | 1935 |
Tri-State League | Arkansas, Delaware, Illinois, Indiana, Iowa, Kentucky, Mississippi, Nebraska, New Jersey, North Carolina, Ohio, Pennsylvania, South Carolina, South Dakota, Tennessee, West Virginia, Wisconsin | Independent (1887–1890, 1895, 1904–1906, 1938–1939) Class B (1907–1914, 1946–1955) Class D (1924–1926) | 1887–1890, 1895, 1904–1914, 1924–1926, 1938–1939, 1946–1955 |
Twin Ports League | Minnesota, Wisconsin | Class E | 1943 |
Twin States League | New Hampshire, Vermont | Class D | 1911 |
Union Association | Idaho, Montana, Utah | Class D | 1911–1914 |
Union Professional League | Delaware, Maryland, New Jersey, New York, Pennsylvania, Washington D.C. | Independent | 1908 |
United States Baseball League | Illinois, New York, Ohio, Pennsylvania, Virginia, Washington D.C. | Independent | 1900, 1912–1913 |
United States League | Illinois, Massachusetts, Michigan, Missouri, New Jersey, New York, Ohio, Pennsylvania | Negro minor | 1945–1946 |
Upper Peninsula League | Michigan, Wisconsin | Independent | 1888, 1890–1891, 1895 |
Utah–Idaho League | Idaho, Utah | Class C | 1926–1928 |
Utah State League | Utah | Independent | 1902 |
Vermont State League | New York, Vermont | Independent | 1907 |
Virginia League | North Carolina, Virginia | Class C (1906–1919) Class B (1920–1928) | 1906–1928 |
Virginia League I | Virginia | Independent (1894) Class B (1895–1896) | 1894–1896 |
Virginia League II | Virginia | Class D | 1900 |
Virginia League III | Virginia | Class D | 1939–1942 |
Virginia League IV | North Carolina, Virginia | Class D | 1948–1951 |
Virginia Mountain League | Virginia | Independent (1912 Class D (1914) | 1912, 1914 |
Virginia-North Carolina League | North Carolina, Virginia | Class C (1901) Class D (1905) | 1901, 1905 |
Virginia Valley League | Kentucky, Oregon, West Virginia | Class D | 1910 |
Washington State League | Washington | Class D | 1910–1912 |
West Coast Negro Baseball Association | California, Oregon, Washington | Negro minor | 1946 |
West Dixie League | Louisiana, Texas | Class C | 1934–1935 |
West Michigan League | Michigan | Class D | 1915 |
West Texas League | Texas | Class D | 1920–1922, 1928–1929 |
West Texas–New Mexico League | New Mexico, Texas | Class D (1937–1942) Class C (1946–1954) Class B (1955) | 1937–1942, 1946–1955 |
West Virginia League | West Virginia | Class D | 1910 |
Western Arkansas League | Arkansas | Class D (1924) | 1924 |
Western Association | Arkansas, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Ohio, Oklahoma, Michigan, Minnesota, Missouri, Nebraska, Texas, West Virginia | Independent (1888–1891, 1893, 1894–1899) Class D (1911, 1914–1917, 1920–1921) Class C (1905–1910, 1922–1932, 1934–1954) | 1888–1891, 1893, 1894–1899, 1901, 1905–1911, 1914–1917, 1920–1932, 1934–1954 |
Western Baseball League | Arizona, California, Oregon, Nevada, Utah | Independent | 1994–2002 |
Western Canada League | Alberta, Manitoba, Saskatchewan | Class D (1907, 1910–1914) Class C (1919) Class B (1920–1921) Independent (1951–1961) | 1907, 1910–1914, 1919–1921, 1951–1961 |
Western Carolina League | North Carolina | Class D | 1948–1952, 1960–1962 |
Western Carolinas League | North Carolina, South Carolina | Class D (1948–1952; 1960–1962) Class A (1963–1979) | 1948–1952, 1960–1979 |
Western International League | Idaho, Oregon, Washington, Alberta, British Columbia | Class B (1922, 1937–1942; 1946–1951) Class A (1952–1954) | 1922, 1937–1942, 1946–1954 |
Western Interstate League | Indiana, Illinois, Pennsylvania | Independent (1883) Class B (1885) | 1883, 1895 |
Western League I | Colorado, Indiana, Iowa, Kansas, Minnesota, Nebraska, Michigan, Ohio, New York, Wisconsin | Independent | 1885–1888, 1892–1899 |
Western League II | Colorado, Iowa, Illinois, Kansas, Minnesota, Missouri, Nebraska, New Mexico, Oklahoma, Texas, Wisconsin | Class A | 1900–1937, 1947–1958 |
Western League III | Colorado, Iowa, Minnesota, Nebraska, South Dakota, Wyoming | Class D | 1939–1941 |
Western New York League | New York | Independent | 1890 |
Western Ontario Baseball Association | Ontario | Class D | 1905 |
Western Pennsylvania League | Maryland, Pennsylvania, West Virginia | Class D | 1907 |
Western Tri-State League | Idaho, Oregon, Washington (state) | Class D | 1912–1914 |
Wisconsin–Illinois League | Illinois, Wisconsin | Class D | 1908–1914, 1926-1927, 1932 |
Wisconsin–Michigan League | Michigan, Wisconsin | Independent | 1892 |
Wisconsin State League | Illinois, Wisconsin | Class D | 1905–1907, 1922-1925, 1928-1931, 1940-1942, 1946-1953 |