Provincial and territorial contacts for birth registration, marriage certificates and other types of registry services are listed below. You may need to look for the heading 'vital statistics' 'registry services' or 'gaming' if you don't see 'birth', 'marriage', 'lottery' etc.
Alberta: Government Services
British Columbia: Vital Statistics, Ministry of Health
Manitoba: Consumer and Corporate Affairs
New Brunswick: Health and Wellness
Newfoundland: Government Services
Northwest Territories: Health and Social Services
Nova Scotia: Vital Statistics
Nunavut: Vital Statistics forms
Ontario: Service Ontario
Prince Edward Island: Info PEI
Quebec: Registrar of Civil Status
Saskatchewan: Vital Statistics
Yukon: Health and Social Services