| Archie Gouldie | 1974/05 | |
| Holds Calgary version, also billed as champion in London, ON. | ||
| Luis Martinez | 1974/05/29? | London, ON? |
| Archie Gouldie [2] | 1974/06/09 | Sarnia, ON |
| Vic Rossatani | 1974/07 // | |
| Sometime after 74/06/26. | ||
| Archie Gouldie [3] | 1974/07/10? | London, ON? |
| Bobo Brazil | 1974/08/21? | London, ON? |
| Still champion as of 74/10/13. | ||
| [...] | ||
| Stan Stasiak | 1974/12/21 // | |
| [...] | ||
| Tony Parisi | 1975/07/25 // | |
| Billed as champion at start of season; still champion as of 75/08/22 | ||
| [...] | ||
| Waldo Won Erich | 1976/05 | |
| Billed as champion at start of season. | ||
| Billy Red Lyons | 1976 | |
| Chris Colt | 1976/08/17 | Simcoe, ON |
| Billy Red Lyons [2] | 1976/08/24 | Simcoe, ON |
| [...] | ||
| Geeto Mongol | 1977/06/15 // | |
| Billed as champion at start of season; inactive until 82 | ||
| [...] | ||
| Whipper Watson Jr. | 1982/07 | |
| Billed as champion at start of season. | ||
| Chris Colt [2] | 1982/07/04 | Scarborough, ON |
| Canadian Wildman (Dave McKigney) | 1982/07 | |
| Chris Colt [3] | 1982/08/01 | Scarborough, ON |
| Whipper Watson Jr. [2] | 1982/08 | |
| [...] | ||
| Chris Colt [4] | 1983/08 | |
| Billed as champion after the start of season. | ||
| Johnny Valiant | 1983/08 | Cornwall, ON |
| Title inactive | ||
North American Heavyweight Title: Title Histories
North American Heavyweight Title: Big Bear - Ontario