| Private (division of Héroux-Devtek Inc.) | |
| Industry | Defence |
| Fate | Acquired |
| Successor | Colt Canada Corporation May 24, 2005 |
| Founded | 1974 |
| Headquarters | Kitchener, Ontario, Canada |
| Products | Firearms, weapons |
Diemaco was a Canadian defence company based in Kitchener, Ontario, Canada, that manufactured the C7 family of rifles under a licence from Colt. It was acquired by Colt Defense on May 20, 2005, in an $18.2 million purchase from parent company Héroux-Devtek Inc, which had purchased Diemaco in 2000.