| Callow, Frenchpark | — | 8 |
| Cam, Brideswell | €160,000 | 8 |
| Carnagh, Kiltoom | — | 7 |
| Carnagh East, Kiltoom | €262,500 | 9 |
| Carolans Court, Kilronan Castle | €205,000 | 22 |
| Carrick Road, Boyle | — | 12 |
| Carrick View, Carrick On Shannon | €135,000 | 15 |
| Carrickmore, Boyle | — | 7 |
| Carrowbehy, Castlerea | — | 10 |
| Carrowmore, Croghan | — | 6 |
| Cartron, Kilmore | — | 6 |
| Cashel Park, Castlerea | €156,000 | 14 |
| Caslin Way, Strokestown | — | 8 |
| Castle Bawn, Ballintubber | — | 7 |
| Castle Court, Ballaghadereen | — | 5 |
| Castle Court, Castlerea Rd | — | 6 |
| Castle Court, Forest Mill Way | €286,344 | 12 |
| Castle Manor, Racecourse Road | €295,000 | 37 |
| Castle Park, Castle St | — | 6 |
| Castle St, Elphin | — | 7 |
| Castle View, Ballintubber | — | 6 |
| Castlebawn, Ballintubber | — | 8 |
| Castlecourt, Ballaghaderreen | €70,250 | 9 |
| Castlemanor, Racecourse Road | — | 9 |
| Castleplunkett, Castlerea | — | 9 |
| Castlerea Road, Ballaghaderreen | — | 6 |
| Cedarwood Dr, Monksland | — | 6 |
| Chapel Street, Elphin | €113,000 | 18 |
| Charlestown Rd, Ballaghaderreen | — | 8 |
| Cherry Blossom Court, Cathedral St | — | 5 |
| Chestnut Grove, Tulsk | €145,000 | 21 |
| Church Road, Castlerea | €93,000 | 19 |
| Church Street, Ballinalough | — | 11 |
| Church Street, Strokestown | €50,000 | 20 |
| Church View, Boyle | — | 6 |
| Claremont, Ballyforan | — | 15 |
| Claremount, Ballyforan | — | 6 |
| clonfad, oldtown | — | 5 |
| Cloonageeragh, Kilrooskey | — | 5 |
| Clooncan, Ballinlough | €135,000 | 8 |
| Cloonchambers, Castlerea | €155,000 | 7 |
| Clooncullane, Strokestown | — | 9 |
| Cloonfad, Ballyhaunis | €130,000 | 11 |
| Cloonfower, Castlerea | — | 6 |
| Cloonfree, Strokestown | — | 7 |
| Cloonlee, Ballinlough | — | 8 |
| Cloonmore, Tarmonbarry | — | 5 |
| Cloonmullen, Loughlynn | — | 6 |
| Cloonsellan, Ballymurray | — | 7 |
| Cloonshannagh, Rooskey | — | 7 |
| Cloonshanville, Frenchpark | — | 8 |
| Cloonshanville Park, Frenchpark | — | 7 |
| Cloonslanor, Strokestown | €100,000 | 16 |
| Cloontowart, Lisacul | €175,000 | 13 |
| Cloontrask, Castlerea | — | 13 |
| Cloontuskert, Lanesboro | — | 6 |
| Cloontuskert, Lanesborough | — | 8 |
| Cloverhill, Ballaghaderreen | — | 5 |
| Cluain Dara, Ballyleague | — | 10 |
| Cluain Fraoigh, Lanesborough Road | €180,000 | 17 |
| Cluainbroc, Old Galway Rd | — | 6 |
| Cnoc Na Giuise, Knockroe | — | 9 |
| Cnoc na Raille, Station Road | — | 9 |
| Cnocan Dubh, Cloonfad | — | 5 |
| Coill Rua, Ballinameen | — | 6 |
| Coillte Bo, Loughglynn | — | 5 |
| Cois na hAbhainn, Croghan | — | 10 |
| Cois na hAbhann, Croghan | — | 16 |
| College Court, Charlestown Road | — | 5 |
| College Park, Boyle | €95,000 | 12 |
| Convent Court, Convent Road | — | 11 |
| COnvent Road, Ballaghaderreen | — | 5 |
| Coolusty, Athleague | — | 6 |
| Cootehall, Boyle | €244,950 | 14 |
| Corbo, Kilrooskey | — | 5 |
| Corboley, Knockcroghery | €240,000 | 12 |
| Corlis, Castlerea | — | 5 |
| Cornabanny, Cloonfad | €118,000 | 9 |
| cornafulla, athlone | — | 5 |
| cornaseer, kiltoom | — | 6 |
| Corran Riada, Athlone | €205,000 | 10 |
| Corran Riada, Monksland | €190,000 | 27 |
| Corraun Village, Racecourse Road | — | 17 |
| Corroy, Ballinameen | — | 5 |
| Corskeagh, Frenchpark | — | 5 |
| Cortober, Carrick on Shannon | €173,000 | 27 |
| Creevy, Lisacul | €150,000 | 17 |
| Cregga Court, Elphin | €137,500 | 16 |
| Crenane, Ballaghaderreen | — | 7 |
| Croghan, Boyle | — | 6 |
| Crosshill, Keadue | — | 5 |
| Crossna, Knockvicar | — | 9 |
| Cuilmore Cove, Cootehall | — | 9 |
| Cullaghamore, Kilglass | — | 6 |
| Curcreigh, Elphin | — | 5 |
| Curlew View, Boyle | €180,500 | 26 |
| Curnalee, Curraghboy | — | 9 |
| Curraghboy, Athlone | — | 5 |
| Curramore, Kiltoom | €165,000 | 10 |
| Currasallagh, Lisacul | — | 7 |
| Curry, Strokestown | — | 9 |
| Cushla Downs, Monksland | — | 7 |
| Cushla Grove, Monksland | — | 16 |
| Cushla Village, Monksland | — | 7 |
| The Crescent, Boyle | — | 7 |