C
- Cache Bay
- Cachet
- Caderette
- Cadmus
- Caesarea
- Cahore
- Cainsville
- Caintown
- Cairngorm
- Cairo
- Caistor Centre
- Caistorville
- Calabogie
- Caledon
- Caledon East
- Caledonia
- Caledonia Springs
- California, Lanark County
- California, Leeds and Grenville United Counties
- Caliper Lake
- Callander
- Callum
- Calm Lake
- Calstock
- Calton
- Camborne
- Cambray
- Cambridge, Prescott and Russell United Counties
- Cambridge, Waterloo Regional Municipality
- Camden
- Camden East
- Camilla
- Camlachie
- Campania
- Campden
- Campbellcroft
- Campbellford
- Campbelltown
- Campbellville
- Camp Oconto
- Canal
- Canborough
- Canfield
- Cannington
- Capreol
- Caramat
- Cardiff
- Cardinal
- Cardwell
- Cargill
- Carholme
- Carleton Place
- Carling
- Carlingford
- Carlington
- Carlisle
- Carlow
- Carlsbad Springs
- Carlsruhe
- Carmel, Northumberland County
- Carmel, Peterborough County
- Carp
- Carrying Place
- Carss
- Cartier
- Cashtown Corners
- Casimir
- Cassburn
- Casselman
- Castlederg
- Castleford
- Castlemore
- Castleton
- Cat Lake
- Cataraqui
- Cathcart
- Caverlys Landing
- Cayuga
- Cavan-Monaghan
- Cecebe
- Cedarbrae
- Cedar Beach
- Cedar Croft
- Cedardale
- Cedar Grove
- Cedar Meadows
- Cedar Mills
- Cedar Valley, Peterborough County
- Cedar Valley, Wellington County
- Cedar Village
- Cedarville, Grey County
- Cedarville, Simcoe County
- Central Patricia
- Centralia
- Centre Dummer
- Centrefield
- Centre Inn
- Centre Wellington
- Centreton
- Centreview
- Centreville, Bruce County
- Centreville, Grey County
- Centreville, Lennox and Addington County
- Centreville, Oxford County
- Centreville, Waterloo Regional Municipality
- Centurion
- Ceylon
- Chaffey's Lock
- Chalk River
- Chapleau
- Charlieville
- Charlottenburgh
- Chartrand Corner
- Chase Corners
- Chatham-Kent
- Chatsworth
- Cheddar
- Cheeseborough
- Chelmsford
- Cheltenham
- Cheney
- Chepstow
- Cherry Valley
- Chesley
- Chesterville
- Chetwynd
- Chevrier
- Chikopi
- Chippewa Hill
- Chippewas of Georgina Island First Nation
- Chippewas of Rama First Nation
- Christian Valley
- Churchill
- Churchville
- Chute-à-Blondeau
- Clappisons Corners
- Clare
- Claremont
- Clarence
- Clarence Creek
- Clarence-Rockland
- Clarendon Station
- Clareview
- Clarina
- Clarington
- Claireville, Brampton; Clairville, Toronto
- Clarke
- Clarkeburg
- Clarkson
- Clavering
- Clayton
- Clear Creek
- Clear Lake
- Clearview
- Clifford
- Clinton
- Clontarf
- Clover Valley
- Cloyne
- Clyde
- Clyde Forks
- Clydesville
- Cobalt
- Cobden
- Coboconk
- Cobourg
- Cochrane
- Cockburn Island
- Coe Hill
- Coin Gratton
- Colbeck
- Colborne
- Colchester
- Cold Springs
- Coldstream
- Coldwater
- Colebrook
- Cole Lake
- Coleraine
- Colgan
- Collingwood
- Collins Bay
- Colpoy's Bay
- Columbus
- Comber
- Combermere
- Commanda
- Concord
- Coniston
- Conn
- Connaught, Renfrew County
- Connaught, Stormont, Dundas and Glengarry United Counties
- Connaught, Timmins
- Connellys
- Conover
- Constance Bay
- Conway
- Cooks Mills, Niagara Region
- Cooks Mills, Nipissing District
- Cook's Shore
- Cookstown
- Cooksville
- Copper
- Cooper's Falls
- Copetown
- Coppell
- Copper Cliff
- Copperhead
- Copperkettle
- Coppins Corners
- Coral Rapids
- Corbeil
- Corbett
- Corbetton
- Corbyville
- Cordova
- Corkery
- Cornell
- Cornwall
- Corunna
- Cotieville
- Cotnam Island
- Cottesloe
- County of Brant
- Courtice
- Courtland
- Courtright
- Craigleith
- Craigmont
- Craig Shore
- Cramahe
- Crathie
- Crawford
- Crean Hill
- Crediton
- Creemore
- Creightons Corners
- Creighton Mine
- Cromarty
- Crombie
- Crooked Bay
- Crookston
- Crooked Creek
- Crosby
- Crosshill
- Crowes Landing
- Crow Lake
- Croydon
- Cruikshank
- Crysler
- Crystal Beach
- Crystal Falls
- Cumberland Beach
- Cumberland, Ottawa
- Cumberland, Simcoe County
- Curran
- Curry Hill
Read more about this topic: List Of Communities In Ontario