| Oatfield Bungalow, Ramelton Rd, Letterkenny | €592,000 | 2025-04-30 |
| Oatlands, Ramelton Rd, Letterkenny | €350,000 | 2022-09-09 |
| Obreins Rd, Lifford, Donegal | €80,000 | 2023-05-12 |
| Ocean Cottage, Magheraclogher, Bunbeg | €146,500 | 2017-07-21 |
| Ocean Drive, Carrowstrasna Road, Greencastle | €232,000 | 2016-12-22 |
| Ocean View, Derrycassen, Downings | €179,985 | 2011-12-21 |
| Oceanview, Ballyboes, Falcarragh | €235,000 | 2024-08-28 |
| Ochiltree, Dunfanaghy, Letterkenny | €1,270,000 | 2022-04-14 |
| Ochtore, Kerrykeel | €36,500 | 2011-10-19 |
| Ochtore, Kerrykeel, Donegal | €87,500 | 2019-04-26 |
| Ogherbeg, Donegal Town | €25,000 | 2011-06-28 |
| Oilean, Na Cealla Beaga, Dun Na Ngall | €325,000 | 2025-07-15 |
| Old Brookcourt, Letterkenny, Donegal | €255,000 | 2024-11-11 |
| Old Chalet 4, Rathmullan House, Rathmullan | €15,500 | 2019-12-06 |
| Old Chalet 6, Rathmullan House, Rathmullan | €137,500 | 2017-09-22 |
| Old Cottage Road, Dunfanaghey | €50,000 | 2013-01-29 |
| Old Cottage, Magheroarty, Donegal | €47,000 | 2014-03-12 |
| Old Cruck Rd, Cruckakeechan, Annagry | €250,000 | 2025-09-11 |
| Old Deanery, Tirconaill St, Donegal Town | €132,500 | 2016-05-26 |
| Old Drung National School, Lower Ballyargus, Red Castle | €210,000 | 2023-10-10 |
| Old Farmhouse, Magheraboy, Letterkenny | €50,000 | 2016-09-23 |
| Old Fintra Rd, Killybegs, Donegal | €850,000 | 2024-02-05 |
| Old Fort Stewart, Ramelton, Donegal | €1,197,000 | 2015-05-15 |
| Old Golf Course Rd, Donegal Town, Donegal | €168,000 | 2014-11-19 |
| Old Golf Course Rd, Donegal, Donegal | €420,000 | 2024-04-04 |
| Old Golf Course Rd, Tullycullion, Donegal | €188,500 | 2021-09-29 |
| Old Golf Course Road, Donegal Town | €230,000 | 2013-08-27 |
| Old Golf Course Road, Donegal Town, County Donegal | €185,000 | 2017-05-13 |
| Old Home, Meenagorey, Buncrana | €75,000 | 2017-01-23 |
| Old House, Dirlaugh, Lettermacaward | €68,000 | 2016-03-24 |
| Old Kennedy Residence, Front Street, Ardara | €450,000 | 2021-08-31 |
| Old Managers House, Monolink, Manorcunningham | €110,000 | 2024-04-15 |
| Old Mill House, Ballycastle | €65,000 | 2014-12-19 |
| Old Mountain, Buncrana, Co Donegal | €48,000 | 2019-03-13 |
| Old National School, Keeloges, Churchill | €70,000 | 2017-03-29 |
| Old Offices, Monolink, Manorcunningham | €130,000 | 2024-04-15 |
| Old Orad, Mountcharles, Co Donegal | €250,000 | 2022-06-29 |
| Old Post Office, Linsfort, Buncrana | €27,000 | 2012-10-31 |
| Old Rd, Ballymacarry Lower, Buncrana | €350,000 | 2026-04-13 |
| Old Rd, Ballymacarry, Buncrana | €177,500 | 2018-11-23 |
| Old Rd, Carnshanagh, Burnfoot | €190,000 | 2024-11-04 |
| Old Rd, Magheracar, Bundoran | €115,000 | 2017-09-15 |
| Old Road, Ballymacarry, Buncrana | €50,000 | 2011-08-09 |
| Old Road, Carnashanagh, Burnfoot | €17,229 | 2011-08-22 |
| Old Road, Mount Charles, Co Donegal | €254,000 | 2022-07-07 |
| Old Road, Mountcharles | €365,000 | 2024-10-07 |
| Old Road, Mountcharles, Co. Donegal | €340,000 | 2025-12-17 |
| Old Road, Mountcharles, Donegal | €205,000 | 2024-03-01 |
| Old Road, Tooban, Burnfoot | €80,000 | 2012-07-26 |
| Old School House, Culdaff | €80,000 | 2011-02-21 |
| Old School House, Glencar Scotch, Letterkenny | €330,000 | 2023-07-27 |
| Old School House, Higginstown, Ballyshannon | €285,000 | 2021-12-01 |
| Old School House, Straleel, Carrick | €48,500 | 2021-10-08 |
| Old Station House, Fahan, Co Donegal | €100,000 | 2019-06-06 |
| Old Trafford, Ballyliffin | €54,000 | 2016-01-26 |
| Old White Cottage, Derrybeg, Donegal | €90,000 | 2017-06-16 |
| Oldtown Cottage, Oldtown, Letterkenny | €72,000 | 2023-07-12 |
| Oldtown, Culdaff, Inishowen | €135,000 | 2022-06-17 |
| Oldtown, Falcarragh, Donegal | €116,805 | 2022-11-16 |
| Oldtown, Kindrum, Letterkenny | €50,000 | 2020-12-21 |
| Oldtown, Letterkenny | €32,500 | 2012-07-04 |
| Oldtown, Letterkenny, Co Donegal | €156,000 | 2017-11-29 |
| Olives View, Annie Bonners Lane, Toberkeen Dunaloe | €26,500 | 2023-10-31 |
| Oort, Gleneely | €140,000 | 2011-08-23 |
| Oorth, Gleneely, Donegal | €113,000 | 2014-11-07 |
| Oran Hill, Letterkenny | €825,000 | 2018-03-29 |
| Oran Na Mara, An Caiseal Ard, Ballyshannon | €155,000 | 2015-04-13 |
| Orbeg, Donegal Town | €90,000 | 2018-09-14 |
| Orchard Grove, Letterkenny, Donegal | €265,000 | 2026-08-27 |
| Orchard Lodge, William St, Raphoe | €126,000 | 2024-05-20 |
| Orient House, Ballyraine Rd, Latterkenny | €325,000 | 2021-04-09 |
| Otter Cottage, Glashbeggan, Burtonport | €300,000 | 2025-10-08 |
| Oughterlin, Rathmullan, Donegal | €20,000 | 2024-12-18 |
| Oughtmeen, Dungloe | €97,500 | 2012-08-07 |
| Oughtmeen, Dungloe, Co. Donegal | €79,000 | 2024-09-27 |
| Oughtmeen, Dungloe, Donegal | €265,000 | 2022-06-30 |
| Oughtmeen, Dungloe, Letterkenny | €38,788 | 2020-11-05 |
| Outown, Rosebeg, Portnoo | €136,000 | 2025-04-25 |
| Overhead Apartment, Single Street Petrol Station, Single Street Bundoran | €130,000 | 2020-08-07 |
| Overhead Apt 3 The Green, Main Street, Convoy | €46,500 | 2017-02-13 |
| Owennagadragh, Crossroads, Killygordon | €252,000 | 2024-11-04 |
| Owenteskna, Carrick, Donegal | €80,000 | 2018-01-03 |
| Owenteskna, Glencolmcille, Co Donegal | €85,000 | 2024-02-22 |
| Owenteskna, Glencolmcille, Donegal | €180,000 | 2024-11-21 |
| Paddy Mors, Araheera, Fanad | €125,000 | 2012-11-21 |
| Pamar Rise, Cashelard, Ballyshannon | €125,000 | 2014-05-30 |
| Papley, The Glebe, Donegal | €390,000 | 2019-07-31 |
| Park Farm, Mouncharles, Co Donegal | €200,000 | 2021-05-10 |
| Park Rd, Sallaghgrane, Letterkenny | €105,000 | 2025-01-22 |
| Parkandy Cottage, The Knather, Ballyshannon | €105,000 | 2015-11-26 |
| Parkheads, Killybegs, Donegal | €360,000 | 2022-12-20 |
| Parkhill House, Parkhill, Ballyshannon | €80,000 | 2015-08-20 |
| Parkhill, Ballishannon, Donegal | €295,000 | 2026-06-11 |
| Parkhill, Ballyshannon, Donegal | €310,000 | 2021-10-22 |
| Parklands, Ballyderowen, Burnfoot | €180,000 | 2024-04-04 |
| Parkmore, Dunfanaghy, Letterkenny | €147,000 | 2019-09-05 |
| Parkmore, Marble Hill, Portnablagh | €353,448 | 2021-07-08 |
| Parkview House, Swilly Park, Ramelton | €155,000 | 2014-04-25 |
| Parochial House (2), Donegal Road, Ballybofey | €105,000 | 2021-10-29 |
| Parochial House, Cleagh, Clonmany | €115,000 | 2019-12-17 |
| Parochial House, Glen Road, Glenties | €245,000 | 2022-10-26 |
| Parochial House, Main Street, Dungloe | €175,000 | 2020-08-07 |
| Patricius, Glencar, Letterkenny | €160,000 | 2021-02-01 |
| Patrick Joseph House, Selacis, Letterbarrow | €320,000 | 2025-06-03 |
| Pattersons Cottage, Eighter Island, Buntonport | €55,000 | 2017-08-23 |
| Pearse Road, Letterkenny | €110,000 | 2014-06-17 |
| Peggys Lott, Carnmalin, Malin Head P O | €40,000 | 2016-02-24 |
| Pembroke Lodge, Bunnymayne Rd, Bridgend | €169,000 | 2019-12-20 |
| Penagh, Bredagh, Glen Moville | €36,000 | 2025-08-19 |
| Penthouse 5, The Courtyard, Market Square | €129,750 | 2021-08-18 |
| Penthouse 7, The Courtyard, Single Street | €132,159 | 2019-05-23 |
| Penthouse 8 Apartment 29, The Courtyard Apartments, Bundoran | €132,158 | 2021-10-28 |
| Penthouse No 6 (apt 27), Market Square, Bundoran | €129,750 | 2021-08-11 |
| Peters Cottage, Upper Louth Salt Rd, Glen | €154,000 | 2015-03-20 |
| Ph 1 Fortwell Apts, Main St, Donegal | €25,000 | 2016-09-19 |
| Ph 2 Fortwell Apts, Main St, Donegal | €54,000 | 2022-07-12 |
| Ph 3, Fortwell Court, Letterkenny | €91,000 | 2026-01-26 |
| Pheasants Patch, Corlea, Ballyshannon | €375,000 | 2022-10-19 |
| Phelans, Main Street, Glenties | €130,000 | 2022-05-26 |
| Pier Rd, Ballyness, Falcarragh | €166,892 | 2015-06-25 |
| Pier Rd, Rathmullan, Donegal | €202,500 | 2023-01-20 |
| Pier Rd, Rathmullan, Letterkenny | €202,500 | 2023-02-03 |
| Pier Road, Rathmullan | €270,000 | 2010-03-31 |
| Pier Road, Rathmullan, Donegal | €152,500 | 2016-02-25 |
| Pillar Park, Buncrana, Donegal | €172,500 | 2024-07-31 |
| Pillar Park, Buncranna, Co Donegal | €290,000 | 2023-01-27 |
| Pin High, Carrowhugh, Greencastle | €210,000 | 2023-03-10 |
| Pine Acre Grange, Dundrain, Burnfoot | €70,000 | 2018-12-07 |
| Pine Grove, Glencar, Letterkenny | €320,000 | 2021-12-13 |
| Pine Tree Cottage, Sheskinarone, Dungloe | €101,000 | 2020-07-07 |
| Pinebrook House, Roshine Rd, Killybegs | €50,000 | 2017-12-12 |
| Pinegarden Cottage, Dromore Lower, Mountcharles | €40,000 | 2019-09-12 |
| Pinewood Lodge, Mullindrait, Stranorlar | €125,000 | 2015-09-30 |
| Pink House, Ludden, Buncrana | €140,000 | 2013-03-01 |
| Pinnhill House, Gortlee Rd, Letterkenny | €160,000 | 2017-05-30 |
| Pipers Point, Benrow, Townasligo | €300,000 | 2017-06-28 |
| Ploghogue, Arranmore Island | €75,000 | 2012-12-20 |
| Plughoge, Arranmore Island | €50,000 | 2012-06-28 |
| Plughoge, Arranmore Island, Letterkenny | €44,720 | 2023-11-06 |
| Pluhogue, Arranmore | €125,000 | 2011-04-15 |
| Point Cottage, Carnbuoy, Carrickfinn | €140,000 | 2019-07-18 |
| Pointview House, Ballybrack, Moville | €240,000 | 2024-07-23 |
| Pol A Tsagart, Tubberkeen, Dungloe | €190,000 | 2019-11-29 |
| Pole Rd, Meenmore, Dungloe | €125,000 | 2023-11-13 |
| Pole Road, Meenmore, Dungloe | €105,000 | 2022-07-11 |
| Poll Mor, Narin, Portnoo | €140,000 | 2015-12-18 |
| Pollaid, Kerrykeel, Donegal | €170,000 | 2019-04-18 |
| Pollaid, Portsalon | €135,000 | 2012-01-12 |
| Pollans, Trentagh, Letterkenny | €162,000 | 2022-04-06 |
| Pollans, Trentagh, Letterkenny P.o | €228,000 | 2018-06-18 |
| Pollet, Portsalon, Letterkenny | €320,000 | 2024-11-15 |
| Pollinaranny, Ballintra | €95,000 | 2012-07-18 |
| Pollnaranny, Ballintra, Donegal | €110,000 | 2018-07-23 |
| Ponderosa Lettermore, Drumkeen, Lifford | €237,000 | 2025-03-06 |
| Port Na Son, Ballyshannon, Donegal | €465,000 | 2026-06-02 |
| Port Nason, Ballyshannon, Co. Donegal | €180,000 | 2024-01-16 |
| Port Rd, Letterkenny, Donegal | €295,000 | 2024-12-18 |
| Port Ronan, West Town, Malin Head | €175,000 | 2019-12-04 |
| Port, Dunfanaghy | €140,000 | 2016-06-15 |
| Port, Inver, Co Donegal | €105,000 | 2014-03-04 |
| Port, Inver, Donegal | €165,000 | 2025-03-22 |
| Portaleen Brae, Glengad, Malin | €75,000 | 2014-03-19 |
| Portaleen Cottage, Portaleen, Crandonagh | €125,000 | 2017-12-21 |
| Portaleen, Malin, County Donegal | €120,000 | 2024-12-11 |
| Porters Lane, Balleelaghan, Malin | €280,000 | 2022-04-08 |
| Porthall Lifford, Lifford, Donegal | €97,000 | 2017-11-20 |
| Porthall, Ballindrait, Lifford | €150,000 | 2021-02-04 |
| Porthall, Co Donegal | €15,000 | 2020-09-30 |
| Porthall, Lifford | €155,000 | 2015-04-02 |
| Porthall, Lifford, Co Donegal | €85,000 | 2017-02-16 |
| Porthall, Lifford, County Donegal | €59,250 | 2013-07-16 |
| Porthall, Lifford, Donegal | €165,000 | 2025-09-11 |
| Porthaw Glen, Buncrana, Co. Donegal | €150,000 | 2011-09-08 |
| Porthaw Glen, Buncrana, Donegal | €540,000 | 2025-02-28 |
| Porthaw, County Donegal | €490,000 | 2023-05-31 |
| Porthaw, Glen, Buncrana | €460,000 | 2023-06-30 |
| Portinure, Lifford | €100,000 | 2012-09-28 |
| Portlean, Kilmacrenan, Donegal | €184,000 | 2018-01-10 |
| Portlean, Kilmacrennan | €80,000 | 2019-03-18 |
| Portlean, Kilmacrennan, Co Donegal | €185,000 | 2024-07-23 |
| Portlean, Kilmacrennan, Donegal | €130,000 | 2019-03-13 |
| Portlough Upper, Bogay, Newtowncunningham | €325,000 | 2021-01-14 |
| Portlough, Newtowncunningham, Donegal | €80,000 | 2015-12-18 |
| Portmore, Pier Road, Malin Head | €270,000 | 2021-08-24 |
| Portnablagh, Letterkenny, Co Donegal | €250,000 | 2024-06-20 |
| Portnacross, Killybegs, Co. Donegal | €12,500 | 2023-08-29 |
| Portnacross, Killybegs, Donegal | €120,000 | 2021-06-24 |
| Portnamurray Bay, Rathmullan, Donegal | €390,000 | 2023-05-23 |
| Portnason, Ballyshannon, Co Donegal | €62,000 | 2014-07-16 |
| Portnason, Ballyshannon, Donegal | €175,000 | 2025-02-06 |
| Portnoo Rd, Ardara, Donegal | €325,000 | 2025-11-19 |
| Portnoo Road, Adrara, Co Donegal | €130,000 | 2017-03-31 |
| Portnoo Road, Ardara | €110,000 | 2012-12-17 |
| Portnoo Road, Ardara, Co Donegal | €44,000 | 2017-09-11 |
| Portnoo Road, Tullycleave, Ardara | €125,000 | 2013-10-18 |
| Portnoo, Co. Donegal | €275,000 | 2016-12-20 |
| Portsalon, County Donegal | €149,000 | 2013-07-02 |
| Portsalon, Donegal | €195,000 | 2011-05-05 |
| Portvale, Burtonport, County Donegal | €33,000 | 2019-07-26 |
| Pound Cottage, Doon Rd, Portnoo | €33,333 | 2015-07-30 |