Regions of Ireland
- Clare
- Clar Bridge Station
- Clara Bridge
- Clara
- Clara
- Clane
- Clamper Cross
- Clahane
- Claggan Upper
- Claggan Mountain
- Claggan Lower
- Claggan
- Claggan
- Claggan
- Clady River
- Clady
- Claddagh
- Chute Hall
- Church Village
- Church Town
- Churchtown
- Churchtown
- Churchtown
- Churchtown
- Churchtown
- Churchtown
- Churchtown
- Churchtown
- Church Hill
- Cherryville Junction
- Cherryville
- Cherrymount
- Cheekpoint
- Charleville Junction
- Charleville House
- Charleville House
- Charleville Castle
- Charleville
- Charleville
- Charlestown
- Charlestown
- Charlesfort House
- Charlesfort
- Chapeltown
- Chapelmidway
- Chapelizod House
- Chapelizod
- Chapel
- Chaffpool House
- Central Plain
- Celbridge
- Cecilstown
- Cavetown
- Cavanagarvan
- Cavanacor House
- An Cabhán
- Cavan
- Causeway
- Cathedral Rocks
- Castle Wray
- Castle Willington
- Castle Widenham
- Castlewarren
- Castlewaller
- Castle View
- Castletownshend
- Castle Townsend
- Castletownroche Station
- Castletownroche
- Castletown River
- Castletown Manor
- Castletown Manor
- Castletown Conyers
- Castletown Castle
- Castletownbere
- Castletown
- Castletown
- Castletown
- Castletown
- Castletown
- Castletown
- Castle Taylor
- Castlestrange Bridge
- Castlestrange
- Castleshannon
- Castleshane House
- Castle Saunderson
- Castle Roche Cross Roads
- Castlerickard House
- Castlerea
- Castlereagh
- Castlequin
- Castlepollard
- Castle Point
- Castleplunket
- Castle Park House
- Castle Park
- Castle Otway
- Castleore
- Castleoliver
- Castle Nugent
- Castlenode House
- Castle Neynoe
- Castlemoyle
- Castle Morres
- Castlemore
- Castlemasters
- Castle Mary
- Castlemartyr House
- Castlemartyr
- Castlemartin
- Castlemaine Harbour
- Castlemaine
- Castlemagarret
- Castlelyons
- Castlelough
- Castle Lambert
- Castle Lacken
- Castleknock
- Castlekevin
- Castle Kevin
- Castlejordan
- Bal Iver
- Castleisland
- Castle Island
- Castle Ievers
- Castle Howard
- Castle House
- Castlehill House
- Castle Haven
- Castle Harrison
- Castle Hamilton
- Castle Hacket
- Castlegrove House
- Castlegrove
- Castlegregory
- Castlegrace House
- Castle Garden House
- Castle Garde
- Castlegar
- Castle Freke
- Castleforward
- Castlefore
- Castle Forbes
- Castle Fogarty
- Castlefinn
- Castle Ffrench
- Castle Ellen
- Castle Durrow
- Castle Donovan
- Castledockrell
- Castledermot
- Castle Dargan House
- Castle Daly
- Castle Daly
- Castle Crine
- Castlecor
- Castlecor
- Castlecoote
- Castle Cooke
- Castleconor
- Castlecomer House
- Castlecomer
- Castle Cary
- Castlebridge
- Castleboy
- Castleboro House
- Castle Blunden
- Castleblayney
- Castleblakeney
- Castleblagh
- Castle Bernard
- Castlebellingham
- Castlebar
- Castle Armstrong
- Cashlieve House
- Cashla Bay
- Cashen River
- Casheltown
- Cashelmore
- Cashel Bay
- Rock of Cashel
- Cashel
- Cashel
- Cashel
- Casheen Bay
- Carton
- Carrowwilkin
- Carrowroe Park
- Carrowreagh
- Carrowreagh
- Carrowntryla House
- Carrownrush Point
- Carrownisky River
- Carrownamaddy River
- Carrownabinna Point
- Carrowmore Point
- Carrowmore Lough
- Carrowmore Lake
- Carrowmore House