This is a list of the weekly Canadian RPM magazine number one Top Singles chart of 1978.
based on the publication's top 100 singles lists.
| Volume:Issue | Issue Date(s) | Song | Artist | |
| 28:15 | 7 January | "How Deep Is Your Love" | Bee Gees | |
| 28:16 | 14 January | |||
| 28:17 | 21 January | |||
| 28:18 | 28 January | |||
| 28:19 | 4 February | "You're in My Heart (The Final Acclaim)" | Rod Stewart | |
| 28:20 | 11 February | "Baby Come Back" | Player | |
| 28:21 | 18 February | "Stayin' Alive" | Bee Gees | |
| 28:22 | 25 February | |||
| 28:23 | 4 March | |||
| 28:24 | 11 March | |||
| 28:25 | 18 March | "Sometimes When We Touch" | Dan Hill | |
| 28:26 | 25 March | "Emotion" | Samantha Sang | |
| 29:1 | 1 April | "Night Fever" | Bee Gees | |
| 29:2 | 8 April | |||
| 29:3 | 15 April | |||
| 29:4 | 22 April | |||
| 29:5 | 29 April | |||
| 29:6 | 6 May | "If I Can't Have You" | Yvonne Elliman | |
| 29:7 | 13 May | |||
| 29:8 | 20 May | "The Closer I Get to You" | Roberta Flack and Donny Hathaway | |
| 29:9 | 27 May | "With a Little Luck" | Paul McCartney and Wings | |
| 29:10 | 3 June | |||
| 29:11 | 10 June | |||
| 29:12 | 17 June | "Shadow Dancing" | Andy Gibb | |
| 29:13 | 24 June | |||
| 29:14 | 1 July | |||
| 29:15 | 8 July | "It's a Heartache" | Bonnie Tyler | |
| 29:16 | 15 July | "Baker Street" | Gerry Rafferty | |
| 29:17 | 22 July | |||
| 29:18 | 29 July | |||
| 29:19 | 5 August | |||
| 29:20 | 12 August | "Miss You" | The Rolling Stones | |
| 29:21 | 19 August | |||
| 29:22 | 26 August | "Three Times a Lady" | Commodores | |
| 29:23 | 2 September | |||
| 29:24 | 9 September | |||
| 29:25 | 16 September | |||
| 29:26 | 23 September | "Grease" | Frankie Valli | |
| 30:1 | 30 September | "Hopelessly Devoted to You" | Olivia Newton-John | |
| 30:2 | 7 October | |||
| 30:3 | 14 October | "Hot Child in the City" | Nick Gilder | |
| 30:4 | 21 October | |||
| 30:5 | 28 October | "You Needed Me" | Anne Murray | |
| 30:6 | 4 November | |||
| 30:7 | 11 November | |||
| 30:8 | 18 November | |||
| 30:9 | 25 November | "MacArthur Park" | Donna Summer | |
| 30:10 | 2 December | |||
| 30:11 | 9 December | "You Don't Bring Me Flowers" | Barbra Streisand and Neil Diamond | |
| 30:12 | 16 December | |||
| 30:13 | 23 December | |||
| 30:14 | 30 December | "I Just Wanna Stop" | Gino Vannelli |
¶ – 2nd week on #1 assumed as RPMs first issue the following year was published for 13 January 1979.