List of number-one singles of 2005 (Ireland)

This is a list of the Irish Recorded Music Association's Irish Singles Chart Top 50 number-ones of 2005.

Issue Date	Song	Artist
6 January	"Numb/Encore"	Linkin Park and Jay-Z
13 January
20 January
27 January
3 February	"Poison/I Believe"	Zoo
10 February	"Almost Here"	Brian McFadden and Delta Goodrem
17 February	"Get Right"	Jennifer Lopez
24 February	"Over and Over"	Nelly featuring Tim McGraw
3 March
10 March
17 March	"All About You/You've Got a Friend"	McFly
24 March	"All About You/You've Got a Friend"	McFly
31 March	"(Is This the Way to) Amarillo"	Tony Christie featuring Peter Kay
7 April
14 April
21 April
28 April
5 May	"Lonely"	Akon
12 May
19 May
26 May
2 June	"Axel F"	Crazy Frog
9 June
16 June
23 June
30 June	"Ghetto Gospel"	2Pac
7 July
9 July
14 July
21 July	"You're Beautiful"	James Blunt
28 July
4 August
11 August
18 August	"Bad Day"	Daniel Powter
25 August
1 September
8 September
15 September	"Don't Cha"	Pussycat Dolls
22 September
29 September
6 October	"Push the Button"	Sugababes
13 October
20 October
27 October	"You Raise Me Up"	Westlife
3 November
10 November
17 November
24 November
1 December
8 December	"My Humps"	The Black Eyed Peas
15 December	"JCB Song"	Nizlopi
22 December	"Leave Right Now"	Mario Rosenstock
29 December	"JCB Song"	Nizlopi