| Camira, Mountmellick | — | 5 |
| Canal Court, Portarlington | — | 9 |
| Capoley, Portlaoise | — | 5 |
| Cappakeel, Emo | — | 7 |
| Carmody Sq, Fairgreen | — | 6 |
| Carmody Walk, Fairgreen | — | 5 |
| Carmody Way, Fairgreen | €200,000 | 34 |
| Carmody Way, The Fairgreen | €193,000 | 11 |
| Carrigan Street, Durrow | €131,000 | 15 |
| Carriglea, Killenard | €617,500 | 27 |
| Castle Ave, Derrin | €212,000 | 8 |
| Castle Avenue, Kilminchy | €250,000 | 15 |
| Castle Dr, Kilminchy | €215,000 | 10 |
| Castle Mews, Kilminchy | €177,500 | 12 |
| Castle Way, Kilminchy | €215,000 | 14 |
| Castlefleming, Errill | — | 6 |
| Castlegate, Portarlington | €271,500 | 14 |
| Castlegate, Station Road | €280,000 | 19 |
| Castlelea Avenue, Portarlington | — | 6 |
| Castlelea View, Portarlington | — | 14 |
| Cedar Avenue, Foxburrow | €361,233 | 12 |
| Chantiere Gate, Portlaoise | — | 9 |
| Chapel Street, Ballinakill | €110,000 | 9 |
| Chapel Street, Mountmellick | €135,000 | 14 |
| Cherrybrook, Foxburrow | — | 6 |
| Cherrygrove, Portlaoise | — | 11 |
| Chestnut Ave, Foxburrow | — | 5 |
| Chestnut Avenue, Esker Hills | €208,000 | 21 |
| Chestnut Avenue, Fruithill Manor | — | 12 |
| Chestnut Close, Foxburrow | €299,559 | 20 |
| Chestnut Close, Fruithill Manor | — | 6 |
| Chestnut Drive, Fruithill Manor | — | 16 |
| Church St, Ballinakill | — | 5 |
| church street, rathdowney | €40,000 | 19 |
| Church View, Ashgrove | — | 6 |
| Churchfield Heights, Castletown | — | 6 |
| Cill Beg Manor, Stradbally | €255,000 | 56 |
| Cilleithne Gardens, Bellingham | €221,410 | 26 |
| Clanmalire Close, Portarlington | — | 9 |
| Clarmallagh, The Swan | €264,313 | 28 |
| Clarney Hall, Rathdowney | — | 9 |
| Clodiagh Way, Clonaslee | — | 9 |
| Cloghane, Errill | — | 7 |
| Clonanny, Portarlington | — | 5 |
| Clonboyne Close, Bellingham | €255,507 | 22 |
| Cloncannon, Mountmellick | — | 5 |
| Clondarrig Court, Bellingham | €194,619 | 41 |
| Clonduff, Rosenallis | — | 6 |
| Clonincurragh, Mountrath | — | 5 |
| Clonkeen, Portlaoise | — | 7 |
| Clonkeen View, Bellingham | €193,029 | 33 |
| Clonkeen View, Mountrath Road | €198,200 | 5 |
| Clonroosk Abbey, Portlaoise | €310,700 | 81 |
| Clonrooske Abbey, Portlaoise | €236,079 | 15 |
| Coill an Easpaig, Portarlington | €339,207 | 59 |
| Coill and Easpaig, Portarlington | — | 7 |
| College Avenue, Mountmellick | €152,750 | 55 |
| College Court, Mountrath Road | — | 12 |
| College Court, Portlaoise | — | 5 |
| College View, Mountmellick | €107,500 | 26 |
| Colliers Lane, Kilminchy | — | 6 |
| Colliers Lane, Portlaoise | — | 6 |
| Colliers View, Colliers Lane | — | 9 |
| Colliers Way, Kilminchy | €345,000 | 12 |
| Congress Terrace, Portarlington | — | 7 |
| Connolly Street, Mountmellick | €153,000 | 11 |
| Conoboro Road, Rathdowney | — | 5 |
| Coolbanagher, Emo | €300,000 | 10 |
| Coolkerry, Rathdowney | — | 7 |
| Coote Street, Portlaoise | — | 6 |
| Cork Rd, Stradbally | — | 6 |
| Cork Road, Durrow | — | 5 |
| Corrig, Stradbally | — | 6 |
| Corrig Glen, Portarlington | — | 23 |
| Corrig Glen, Station Rd | — | 6 |
| Corrig Lodge, Portarlington | €247,500 | 16 |
| Cosby Ave, The Fairgreen | — | 6 |
| Cosby avenue, Fairgreen village | €218,000 | 17 |
| Cosby Avenue, Fairgreen | €180,000 | 24 |
| Courthouse Square, Maryborough Village | €230,000 | 9 |
| Courtwood, Vicarstown | — | 5 |
| Crann Nua, Edenderry Road | €133,500 | 27 |
| Crann Nua, Portarlington | €203,750 | 59 |
| Crann Nua Portarlington, Portarlington | — | 6 |
| Craydon Court, Portlaoise | — | 5 |
| Cross Of, Ballyroan | — | 5 |
| Cross of Newtown, Ballyroan | — | 9 |
| Crossard, Wolfhill | — | 5 |
| Crossneen Manor, Graiguecullen | — | 6 |
| Cullen Wood, Mountmellick | — | 5 |
| Cullenagh, Portlaoise | — | 5 |
| Cushina Avenue, Portarlington | €286,343 | 45 |
| The Close, Graigavern Lodge | — | 15 |
| The Courtyard, Rath Rua | €314,978 | 10 |
| The Crescent, Kilminchy | — | 12 |
| The Crescent, Mount Stewart | €238,412 | 10 |
| The Cross of Newtown, Ballyroan | €324,025 | 28 |