- United Automobile Workers of Canada
- United Church of Canada
- United Conservative Party
- United Empire Loyalists' Association of Canada
- United Farm Women of Alberta
- United Farmers of Alberta
- United Farmers of Canada
- United Farmers of Manitoba
- United Farmers of Ontario
- United Farmers of Quebec
- United Nations
- United Nations Conference on Trade and Development (UNCTAD)
- United Steelworkers
- Unity
- Universe
- Université de Moncton
- Université de Montréal
- Université de Sherbrooke
- Université du Québec à Montréal (UQAM)
- Université du Québec à Rimouski (UQAR)