List of number-one singles of 2021 (Ireland)

The Irish Singles Chart ranks the best-performing singles in Ireland, as compiled by the Official Charts Company on behalf of the Irish Recorded Music Association.^[1]

Issue date	Song	Artist(s)	Reference
1 January	"Paradise"	Meduza featuring Dermot Kennedy	[2]
8 January			[3]
15 January	"Drivers License"	Olivia Rodrigo	[4]
22 January			[5]
29 January			[6]
5 February			[7]
12 February			[8]
19 February			[9]
26 February			[10]
5 March			[11]
12 March			[12]
19 March	"The Business"	Tiësto	[13]
26 March	"Peaches"	Justin Bieber featuring Daniel Caesar and Giveon	[14]
2 April	"Montero (Call Me by Your Name)"	Lil Nas X	[15]
9 April			[16]
16 April			[17]
23 April			[18]
30 April			[19]
7 May	"Body"	Tion Wayne and Russ Millions	[20]
14 May			[21]
21 May	"Good 4 U"	Olivia Rodrigo	[22]
28 May			[23]
4 June			[24]
11 June			[25]
18 June			[26]
25 June			[27]
2 July	"Bad Habits"	Ed Sheeran	[28]
9 July			[29]
16 July			[30]
23 July			[31]
30 July			[32]
6 August			[33]
13 August			[34]
20 August			[35]
27 August			[36]
3 September			[37]
10 September			[38]
17 September	"Shivers"		[39]
24 September			[40]
1 October			[41]
8 October			[42]
15 October			[43]
22 October	"Easy on Me"	Adele	[44]
29 October			[45]
5 November			[46]
12 November			[47]
19 November	"All Too Well (Taylor's Version)"	Taylor Swift	[48]
26 November	"Easy on Me"	Adele	[49]
3 December			[50]
10 December			[51]
17 December			[52]
24 December	"Merry Christmas"	Ed Sheeran and Elton John	[53]
31 December			[54]

Number-one artists

Position	Artist	Weeks at No. 1
1	Ed Sheeran	18
2	Olivia Rodrigo	15
3	Adele	9
4	Lil Nas X	5
5	Meduza	2
	Dermot Kennedy
	Tion Wayne
	Russ Millions
	Elton John
9	Tiësto	1
	Justin Bieber
	Daniel Caesar
	Giveon
	Taylor Swift

See also

• List of number-one albums of 2021 (Ireland)
• List of top 10 singles in 2021 (Ireland)