Cities and Communities in Southern Ontario
(check also Northern Ontario)
| Dacre | Delmer | Dorking | Dundas |
| Dain City | Deloro | Dorland | Dundela |
| Dale | Delta | Dornoch | Dundonald |
| Dalhousie Mills | Demorestville | Dorset | Dunedin |
| Dalkeith | Denbigh | Douglas | Dungannon |
| Dalrymple | Denfield | Douro | Dunkerron |
| Dalston | Desboro | Dover Centre | Dunlop |
| Damascus | Deseronto | Downeyville | Dunnville |
| Dartford | Detlor | Drayton | Dunrobin |
| Dashwood | Deux Rivieres | Dresden | Dunsford |
| Day Mills | Dillon | Drew Station | Duntroon |
| Deacon | Dixons Corners | Dromore | Dunvegan |
| Dealtown | Dobbinton | Drumbo | Durham |
| Dean Lake | Doe Lake | Duart | Dutton |
| Deanlea Beach | Dokis | Dublin | Dutton/Dunwich |
| Decewsville | Domville | Duclos Point | Duttona Beach |
| Deep River | Donald | Duff's Corners | Dwight |
| Deerbrook | Donegal | Dunbar | Dyer's Bay |
| Delaware | Donwood | Dunchurch | |
| Delhi | Dorchester | Dundalk |