D
- Dacre
- Dain City
- Dale
- Dalhousie Lake
- Dalhousie Mills
- Dalkeith
- Dalmeny
- Dalrymple
- Dalston
- Dalton
- Damascus
- Dane
- Darlingside
- Dartford
- Dashwood
- Davis Mills
- Dawn-Euphemia
- Dawson
- Dawn Valley
- Dee Bank
- Deep River
- Deer Lake
- Dejong
- Delamere
- Delaware
- Delhi
- Delta
- Deloro
- Denbigh
- Den-Lou
- Depot Harbour
- Dereham Centre
- Derland
- Derryville
- Desbarats
- Desboro
- Deseronto
- Deux Rivières
- Dexter
- Dickson Hill
- Dillon
- Dinner Point Depot
- Dinorwic
- Dixie
- Dixon's Corners
- Dobbinton
- Doe Lake
- Dokis
- Dominionville
- Domville
- Dongola
- Don Mills
- Donwood
- Dorchester
- Dorion
- Dorking
- Dornoch
- Dorset
- Douglas
- Douro
- Douro-Dummer
- Dowling
- Downeyville
- Dracon
- Drayton
- Dresden
- Driftwood
- Dormore
- Drummond Centre
- Drummond/North Elmsley
- Dryden
- Dryden's Corner
- Dublin
- Dubreuilville
- Duclos Point
- Duck Lake
- Dudley
- Dufferin Bridge
- Duffy
- Dulcemaine
- Dunblanc
- Dunchurch
- Dundalk
- Dundas
- Dundonald
- Dunedin
- Dugannon
- Dunkeld
- Dunnet's Corner
- Dunnette Landing
- Dunns Valley
- Dunnville
- Dunsford
- Duntroon
- Durham
- Duthill
- Dutton
- Dutton/Dunwich
- Dunvegan
- Dwight
- Dyer
- Dymond
- Dysart et al.
Read more about this topic: List Of Communities In Ontario