- Duel
- Duet Club of Hamilton
- Duff Gibson
- Dufferin Roblin
- Duffus, Romans, Kundzins, Rounsefell Ltd
- Dugout Canoe
- Dujka Smoje
- Duke Energy Corp
- Duke Street Records
- Dumbells
- Dumont Supports Separation
- Dunblane Massacre
- Duncan
- Duncan Anderson McNaughton
- Duncan Campbell Scott
- Duncan Hood
- Duncan Ian Macpherson
- Duncan McDowall
- Duncan McEachran
- Duncan McGillivray