| Loughbratty, Castleblayney, Monaghan | €35,000 | 2023-05-12 |
| Loughderry, Coolderry Po, Carrickmacross | €220,000 | 2022-09-05 |
| Lowart Lanehouse, Looart, Glaslough | €120,000 | 2022-12-21 |
| Lower Bree Rd, Castleblayney, Monaghan | €230,000 | 2021-10-01 |
| Lower Main St, Ballybay, Main St | €31,000 | 2016-03-10 |
| Lower Main Street, Ballybay, Co Monaghan | €56,000 | 2023-10-16 |
| Lower Main Street, Emyvale, Co. Monaghan | €150,000 | 2023-12-12 |
| Lower Main Street, Newbliss, Co. Monaghan | €107,000 | 2026-04-17 |
| Lower Main Street, Newbliss, County Monaghan | €27,000 | 2016-09-06 |
| Loyst, Stranooden, Monaghan | €190,000 | 2018-03-06 |
| Lurganboy, Castleblayney, Monaghan | €230,000 | 2017-10-05 |
| Lurganmore, Castleblayney, Co Monaghan | €35,000 | 2016-06-04 |
| Lurgans Carrickmacross, Carrickmacross, Monaghan | €167,500 | 2015-11-05 |
| Lurgans, Carrickmacross, Co. Monaghan | €245,000 | 2021-04-20 |
| Lurgans, Carrickmacross, Monaghan | €50,000 | 2022-11-17 |
| Lurgans, Shercock Rd, Carrickmacross | €154,000 | 2016-01-27 |
| Lyndale House, Oriel Park Road, Emyvale | €164,000 | 2015-10-01 |
| Magheraboy Rd, Carrickmacross, Monaghan | €385,000 | 2018-11-29 |
| Magheraney, Smithboro, Co Monaghan | €142,200 | 2017-09-29 |
| Magherarney, Smithboro, Monaghan | €61,675 | 2017-09-29 |
| Magherarny, Smithborough, Monaghan | €165,000 | 2026-08-05 |
| Maghernaharny, Rockcorry, Co Monaghan | €290,700 | 2026-04-01 |
| Maghernaharny, Rockcorry, Monaghan | €219,000 | 2021-04-08 |
| Magheross, Ardee Road, Carrickmacross | €210,000 | 2021-11-17 |
| Magheross, Carickmacross, Monaghan | €225,000 | 2021-06-01 |
| Magheross, Carrickmacross | €45,000 | 2013-01-26 |
| Magheross, Carrickmacross, Monaghan | €113,000 | 2015-03-27 |
| Maghery, Smithboro, Monaghan | €27,500 | 2015-07-17 |
| Maghery, Smithborough, County Monaghan | €35,000 | 2018-06-05 |
| Mahon, Latton, Castleblayney | €50,000 | 2022-07-20 |
| Main St Emyvale, Emyvale, Monaghan | €135,000 | 2023-08-02 |
| Main St, Castleblayney, Monaghan | €202,000 | 2024-11-11 |
| Main St, Emyvale, Monaghan | €47,000 | 2024-05-23 |
| Main St, Glaslough Village, Monaghan | €60,000 | 2021-05-24 |
| Main St, Glaslough, Monaghan | €170,000 | 2024-01-16 |
| Main St, Newbliss, Monaghan | €100,000 | 2026-02-05 |
| Main St, Scotstown, Monaghan | €105,000 | 2024-06-19 |
| Main Street, Ballybay | €50,000 | 2023-02-07 |
| Main Street, Castleblayney, Co Monaghan | €48,000 | 2017-01-24 |
| Main Street, Glaslough, Monaghan | €70,000 | 2012-10-03 |
| Main Street, Newbliss, County Monaghan | €30,000 | 2023-03-29 |
| Main Street, Rockcorry, County Monaghan | €50,000 | 2013-12-09 |
| Main Street, Scotstown | €60,000 | 2016-01-21 |
| Main Street, Scotstown, Co Monaghan | €70,000 | 2016-11-02 |
| Main Street, Scotstown, County Monaghan | €130,000 | 2017-08-21 |
| Main Street, Smithboro, Co. Monaghan | €165,000 | 2025-01-20 |
| Main Street, Smithborough, Co Monaghan | €175,000 | 2023-08-11 |
| Main Street, Smithborough, Monaghan | €47,000 | 2019-03-29 |
| Main Street, Smithsboro, Co Monaghan | €52,000 | 2017-07-21 |
| Malvern House, Cormeen, Monaghan | €90,000 | 2013-07-19 |
| Maranatha, Leagh, Monaghan | €155,000 | 2017-04-13 |
| Marcor, Knocknagarnaman, Inniskeen | €240,000 | 2014-06-17 |
| Marian House, Latlurcan, Monaghan Town | €120,000 | 2015-03-16 |
| Marian Villa, Magheross, Carrickmacross | €200,000 | 2019-06-05 |
| Market House Lane, Emyvale, Monaghan | €225,000 | 2025-09-04 |
| Market Sq, Castleblayney, Co Monaghan | €120,000 | 2025-10-02 |
| Market Sq, Castleblayney, Monaghan | €184,000 | 2016-04-22 |
| Market Square, Castleblayney | €50,000 | 2011-02-04 |
| Marnaharney, Rockcorry, Co Monaghan | €103,000 | 2025-06-30 |
| Marnakill, Castleblayney, Monaghan | €230,000 | 2022-11-04 |
| Marnakill, Dundalk Rd, Castleblayney | €201,000 | 2024-07-02 |
| Maryland, Coolshannagh, Monaghan | €350,000 | 2025-02-25 |
| Mason Lodge, Carrickmacross, Monaghan | €375,000 | 2015-10-29 |
| Mccabes Tavern, Muckno Street, Castleblayney | €20,000 | 2012-09-27 |
| Mccagues, Main St, Smithboro Village | €102,500 | 2024-01-30 |
| Mccurtain St, Clones, Co Monaghan | €60,000 | 2017-01-12 |
| Mccurtain St, Clones, Monaghan | €105,000 | 2025-06-05 |
| Mccurtain Street, Clones | €75,000 | 2016-01-25 |
| Mccurtain Street, Clones, Co. Monaghan | €25,000 | 2022-10-20 |
| Mcginns Public House, Main St, Newbliss | €25,000 | 2017-03-06 |
| Mcmanus Cottage, Lossetts, Carrickmacross | €186,000 | 2026-02-12 |
| Meadow Brooke, Portinaghy, Emyvale | €310,000 | 2026-06-01 |
| Meadow View, Creighans, Glaslough | €350,000 | 2024-01-10 |
| Meadowside Gola, Scotstown, Monaghan | €230,000 | 2017-09-07 |
| Meath Hill, Coolderry, Carrickmacross | €140,000 | 2018-10-10 |
| Meeting House Lane, Ballybay, Monaghan | €100,000 | 2018-07-25 |
| Melrose House, Tullyharnet, Castleblayney | €245,000 | 2022-08-29 |
| Mileriver, Ballybay Road, Carrickmacross | €170,000 | 2015-07-16 |
| Mill View House, Leck, Monaghan | €50,000 | 2022-03-01 |
| Millbrook, Conaghy, Newbliss | €227,000 | 2022-04-13 |
| Millbrook, Drumass, Inniskeen | €178,000 | 2019-01-14 |
| Milltown, Monaghan | €270,000 | 2025-08-29 |
| Milltown, Monaghan, Monaghan | €140,000 | 2026-03-16 |
| Milltown, Rockcorry | €100,000 | 2013-12-23 |
| Millview House, Milltown Oram, Castleblayney | €360,000 | 2024-10-03 |
| Minard, Drumbear, Cootehill Rd | €335,000 | 2024-12-11 |
| Miullaghadun, Monaghan Town | €170,000 | 2022-12-13 |
| Mobane House, Dundalk Rd, Castleblayney | €1,000,000 | 2025-01-07 |
| Momoney, Carrickmacross, County Monaghan | €165,000 | 2024-11-07 |
| Momoney, Carrickmacross, Monaghan | €480,000 | 2024-02-01 |
| Monaghan Rd, Castleblayney, Monaghan | €287,000 | 2020-10-16 |
| Monaghan Rd, Clones, Monaghan | €30,000 | 2014-12-23 |
| Monaghan Road, Rockcorry, Co Monaghan | €20,000 | 2026-07-20 |
| Monagirr Donaghmoyne, Carrickmacross, Monaghan | €120,000 | 2022-03-31 |
| Monagirr, Culloville, Castleblay | €60,000 | 2021-01-13 |
| Monagirr, Culloville, Castleblayney | €210,000 | 2022-04-20 |
| Monaltybane, Carrickmacross | €385,000 | 2020-03-27 |
| Monanny, Carrickmacross, Monaghan | €835,000 | 2026-02-12 |
| Money, Latton, Monaghan | €175,000 | 2024-07-23 |
| Money, Lisnalong, Monaghan | €27,000 | 2016-03-02 |
| Moneyglen, Broomfield, Castleblaney | €285,000 | 2021-12-15 |
| Moneyglen, Broomfield, Castleblayney | €100,000 | 2018-06-26 |
| Monmurry, Emyvale, Monaghan | €250,000 | 2022-01-21 |
| Mount Fairview House, Bryanlitter, Monaghan | €275,000 | 2018-10-10 |
| Mount Lodge, Lisnalong | €95,000 | 2011-12-07 |
| Mount Lodge, Lisnalong P.o. | €14,000 | 2011-06-07 |
| Moy Bridge, Emyvale, Co Monaghan | €305,000 | 2023-02-14 |
| Moy Otra, Clontibret, Co Monaghan | €207,500 | 2024-04-04 |
| Moyetra, Castleshane, Co Monaghan | €99,000 | 2014-08-07 |
| Moyetra, Castleshane, Monaghan | €350,000 | 2022-05-06 |
| Moykieran, Carrickmacross, Co Monaghan | €150,000 | 2024-08-14 |
| Moyles, Inniskeen | €158,000 | 2010-11-10 |
| Moyles, Inniskeen, Monaghan | €195,000 | 2018-04-19 |
| Moyneill, Rockcorry, Monaghan | €63,000 | 2016-03-02 |
| Moys, Castleshane, Monaghan | €200,000 | 2025-08-06 |
| Moys, Clontibret, Monaghan | €270,000 | 2023-01-18 |
| Moys, Emyvale | €193,000 | 2011-04-13 |
| Muckno St, Castleblayney, Co Monaghan | €206,000 | 2021-09-17 |
| Muckno Street, Castleblaney, Co Monaghan | €155,000 | 2023-12-11 |
| Muckno Street, Castleblayney | €45,000 | 2013-01-10 |
| Muckno Street, Castleblayney, Co Monaghan | €95,000 | 2025-05-09 |
| Muckno Street, Castleblayney, Co. Monagan | €20,000 | 2014-08-29 |
| Muff, Inniskeen, Co Monaghan | €55,000 | 2018-11-06 |
| Muillinary Road, Carrickmacross, Monaghan | €125,000 | 2017-07-27 |
| Mullabryan, Emyvale, Co Monaghan | €240,000 | 2024-08-27 |
| Mullach Glas, Monaghan | €220,000 | 2015-09-30 |
| Mulladermot, Emyvale, Monaghan | €185,000 | 2015-06-12 |
| Mulladuff, Glaslough, Co Monaghan | €80,000 | 2025-05-21 |
| Mulladuff, Smithboro, Monaghan | €143,000 | 2023-04-05 |
| Mulladuff, Smithborough, Monaghan | €235,000 | 2024-08-23 |
| Mullagh, Iniskeen, Monaghan | €145,000 | 2017-07-06 |
| Mullagh, Inniskeen | €167,401 | 2012-10-05 |
| Mullaghadun, Monaghan | €32,000 | 2018-12-21 |
| Mullaghadun, Scotstown Rd, Monaghan | €260,000 | 2020-11-23 |
| Mullaghbrack, Smithboro, Co Monaghan | €86,000 | 2023-09-06 |
| Mullaghcor, Emyvale, Monaghan | €70,000 | 2016-06-20 |
| Mullaghcrockery, Clones Rd, Monaghan | €231,000 | 2017-04-11 |
| Mullaghcroghery, Clones Rd, Monaghan | €245,000 | 2020-07-21 |
| Mullaghcroghery, Clones Road, Monaghan | €300,000 | 2021-06-14 |
| Mullaghcroghery, Co. Monaghan, Co. Monaghan | €100,000 | 2013-12-05 |
| Mullaghcroghery, Corduff, Carrickmacross | €45,000 | 2022-06-09 |
| Mullaghdun, Clones Rd, Monaghan | €226,129 | 2025-09-03 |
| Mullaghdun, Monaghan | €66,666 | 2010-04-14 |
| Mullaghgreenan, Aghabog, Newbliss | €45,000 | 2018-05-31 |
| Mullaghmacateer, Carrickmacross | €405,000 | 2010-11-05 |
| Mullaghmacateer, Carrickmacross, County Monaghan | €290,000 | 2018-11-30 |
| Mullaghmeen, Carrickmacross, Co. Monaghan | €50,000 | 2024-05-21 |
| Mullaghmore North, Tydavnet, Co. Monaghan | €335,000 | 2024-10-30 |
| Mullaghmore North, Tydavnet, Monaghan | €295,000 | 2025-09-12 |
| Mullaghmore West, Ballinode, Monaghan | €190,000 | 2018-12-20 |
| Mullaghmore, Monaghan | €271,000 | 2015-08-07 |
| Mullaghmore, Newbliss | €50,000 | 2013-06-04 |
| Mullaghrafferty, Carrickmacross | €100,000 | 2010-12-17 |
| Mullaghshinagh, Inniskeen, Monaghan | €60,000 | 2021-07-23 |
| Mullaghunshinagh, Inniskeen, Co. Monaghan | €275,000 | 2025-05-23 |
| Mullaglassan, Smithborough, Monaghan | €150,000 | 2021-12-21 |
| Mullaloughan, Glaslough | €32,000 | 2014-07-03 |
| Mullan, Ballybay, Monaghan | €20,000 | 2017-04-28 |
| Mullanacloy, Clones, Monaghan | €208,000 | 2021-06-25 |
| Mullanarockan, Tydavnet, Monaghan | €380,000 | 2025-09-12 |
| Mullanarry, Carrickmacross | €155,000 | 2011-11-29 |
| Mullanary, Ballybay, Monaghan | €55,000 | 2018-02-15 |
| Mullanlary Hill, Glaslough, Monaghan | €250,000 | 2023-08-24 |
| Mullatigorry, Smithborough, Co. Monaghan | €30,000 | 2021-07-22 |
| Mullatishaughlin, Ballinode, Monaghan | €230,000 | 2022-10-13 |
| Mullinacross, Smithborough, Monaghan | €150,000 | 2014-06-20 |
| Mullinahinch, Monaghan | €245,000 | 2022-03-29 |
| Mullinahinchago, Tydavnet | €36,000 | 2012-02-06 |
| Mullinahinchago, Tydavnet, Monaghan | €275,000 | 2023-11-07 |
| Mullinahinichago, Tydavnet, Monaghan | €220,000 | 2015-03-24 |
| Mullinamoy, Clones, Monaghan | €310,000 | 2025-01-13 |
| Mullinarockan, Tydavnet, Co Monaghan | €46,500 | 2014-10-15 |
| Mullinarry, Carrickmacross | €75,000 | 2013-07-19 |
| Mullinary Rd, Carrickmacross, Monaghan | €192,500 | 2022-11-11 |
| Mullinary Road, Carrickmacross | €361,234 | 2025-12-18 |
| Mullinary, Carrickmacross | €16,000 | 2012-08-31 |
| Mullinary, Carrickmacross, Co Monaghan | €115,000 | 2017-10-19 |
| Mullintlavin, Magheracloone, Carrickmacross | €180,000 | 2017-10-04 |
| Mullyagarry, Castleshane, Co Monaghan | €30,000 | 2015-06-23 |
| Mullyera, Tydavnet, Co Monaghan | €100,000 | 2014-05-09 |
| Mullyknock, Monaghan, Monaghan | €100,000 | 2017-12-21 |
| Mullylusty, Coolderry, County Monaghan | €207,000 | 2023-07-17 |
| Munilly, Clones, County Monaghan | €16,000 | 2018-07-04 |
| Munnilly, Clones, Co Monaghan | €40,000 | 2026-04-28 |
| N07 The Meadows, Smithborough, Monaghan | €165,000 | 2017-06-14 |
| Nafarty, Carrickmacross | €87,000 | 2013-02-08 |
| Nafferty, Ballybay Rd, Carrickmacross | €305,000 | 2025-10-10 |
| Nafferty, Ballybay Road, Carrickmacross | €237,000 | 2022-07-04 |
| Nafferty, Ballybeg Road, Carrickmacross | €120,000 | 2018-05-08 |
| Nafferty, Carrickmacross, Co. Monaghan | €33,333 | 2016-04-08 |
| Naffery, Ballybay Road, Carrickmacross | €125,000 | 2013-10-16 |
| Nafftery, Ballybay Road, Carrickmacross | €93,000 | 2015-07-31 |
| Nahill, Smithboro, Co Monaghan | €65,000 | 2024-05-14 |
| Nart, Swans Cross, Rockcorry | €200,000 | 2024-09-16 |
| Neart, Smithboro, Co Monaghan | €120,000 | 2017-05-11 |
| New Line, Glaslough, Monaghan | €168,000 | 2021-07-29 |
| New St, Castleblayney, Monaghan | €192,500 | 2021-05-11 |
| New Street, Castleblaney, County Monaghan | €20,000 | 2015-12-14 |
| New Street, Castleblayney, Co. Monaghan | €90,000 | 2020-11-06 |
| Newbliss Garda Station, Lisdarragh, Newbliss | €103,720 | 2026-02-18 |