List of number-one singles of 1978 (Ireland)

This is a list of singles which have reached number one on the Irish Singles Chart in 1978.

Week ending	Song	Artist	Ref.
7 January	"Mull of Kintyre"	Wings
14 January
21 January
28 January
4 February
11 February
18 February	"Figaro"	Brotherhood of Man
25 February	"Take a Chance on Me"	ABBA
4 March	"The Rare Auld Times"	Danny Doyle
11 March
18 March	"Wuthering Heights"	Kate Bush
25 March
1 April
8 April	"Matchstalk Men and Matchstalk Cats and Dogs"	Brian and Michael
15 April
22 April
29 April	"Night Fever"	The Bee Gees
6 May
13 May
20 May	"Rivers of Babylon"	Boney M
27 May
3 June
10 June
17 June
24 June	"You're the One That I Want"	John Travolta and Olivia Newton-John
1 July
8 July
15 July
22 July
29 July
5 August
12 August
19 August	"Substitute"	Clout
26 August	"You're the One That I Want"	John Travolta and Olivia Newton-John
2 September	"Three Times a Lady"	The Commodores
9 September
16 September
23 September	"Summer Night City"	ABBA
30 September	"One Day at a Time"	Gloria
7 October	"Summer Nights"	John Travolta and Olivia Newton-John
14 October
21 October
28 October
4 November	"Sandy"	John Travolta
11 November	"One Day at a Time"	Gloria
18 November	"Hopelessly Devoted to You"	Olivia Newton-John
25 November	"Mary's Boy Child – Oh My Lord"	Boney M
2 December
9 December
16 December
23 December
30 December

• 17 Number Ones
• Most weeks at No. 1 (artist): John Travolta (14), Olivia Newton-John (14)
• Most weeks at No. 1 (song): "You're The One That I Want" - John Travolta and Olivia Newton-John (9)
• Most No.1s: John Travolta (3), Olivia Newton-John (3)
• 4 songs from the film Grease reached No. 1: "You're The One That I Want", "Summer Nights", "Sandy" and "Hopelessly Devoted to You"

See also

• 1978 in music
• Irish Singles Chart
• List of artists who reached number one in Ireland