| Wherrew, Cloghans, Mayo | €180,000 | 2022-08-24 |
| Whistling Straits, Rosbeg, Westport | €690,000 | 2011-12-20 |
| White House Haven, Carabawn, Aghamore | €55,000 | 2020-09-17 |
| White O' Morn Cottage, Castletown, The Neale | €110,000 | 2025-12-19 |
| White O'morn Cottage, Caher, Kiltimagh | €75,000 | 2019-08-15 |
| White Rose Cottage, Barnahesker, Aghamore | €90,000 | 2016-10-06 |
| Whitehouse, Castlebar St, Westport | €210,000 | 2018-07-31 |
| Whitestream, Bonniconlon, Ballina | €85,000 | 2026-03-24 |
| Whitethorn Cottage, Carratowick, Westport | €280,000 | 2026-04-09 |
| Whitethorn House, Knockroe Mayoabbey, Claremorris Mayo | €367,500 | 2019-05-20 |
| William St, Killala, Mayo | €330,000 | 2025-11-10 |
| Willow Cottage, Churchfield, Knock | €237,000 | 2025-05-06 |
| Willow Cottage, Owenwee, Liscarney | €249,000 | 2020-10-27 |
| Willow Lane, Carrabawn, Westport | €23,000 | 2015-07-31 |
| Wilow Lodge, Westport Road, Castlebar | €406,097 | 2024-05-29 |
| Windmill Farm, Ballinaloob, Newbrook | €120,000 | 2022-09-28 |
| Windsor Brendrum, Castlebar, Mayo | €409,900 | 2023-12-14 |
| Windsor, Castlebar, Co Mayo | €630,000 | 2017-11-08 |
| Windsor, Castlebar, Mayo | €310,000 | 2022-05-12 |
| Windy Meadows, Bollinglanna Currane, Westport | €270,000 | 2020-05-15 |
| Windyridge, Rosbeg, Westport | €487,000 | 2020-11-26 |
| Wingfield, Knock, Claremorris | €90,000 | 2019-09-13 |
| Winterhouse, Ballinastanford, Claremorris | €115,000 | 2018-08-22 |
| Wojtyla, Carrowmore, Knock | €135,000 | 2025-12-16 |
| Woodbrook Springfield, Castlebar, Mayo | €210,000 | 2023-11-02 |
| Woodcock Lodge, Ballykine, Clonbur | €260,000 | 2015-01-19 |
| Woodeen, Liscarney, Westport | €95,000 | 2016-01-05 |
| Woodfield, Aughamore, Ballyhaunis | €55,000 | 2015-05-29 |
| Woodhill, Tullaghaune, Ballyhaunis | €435,000 | 2025-08-01 |
| Woodland House, Tourmakeady, Mayo | €131,000 | 2025-05-26 |
| Woodlawn Ballyholan, Ballina, Mayo | €680,000 | 2022-04-29 |
| Woodlawn, Newport Rd, Westport | €260,000 | 2024-04-26 |
| Woodpark, Ballyhaunis, Mayo | €80,000 | 2017-09-08 |
| Woodpark, Glencorrib, Shrule | €240,000 | 2018-09-25 |
| Woodpark, Shrule, Mayo | €104,483 | 2026-07-31 |
| Woods, Midfield, Swinford | €120,000 | 2023-02-21 |
| Woodstock, Ballindine, Co Mayo | €90,000 | 2021-12-17 |
| Woodstock, Ballindine, Mayo | €180,000 | 2020-11-26 |
| Woodstock, Cahernablauhy, Ballinrobe | €185,000 | 2017-11-07 |
| Woodview House, Kilgeever, Louisburgh | €95,000 | 2017-11-14 |
| Woodview Lodge, Breaffy, Castlebar | €455,000 | 2023-11-09 |
| Woodview, Cloonacurry, Bekan | €295,000 | 2023-05-19 |
| Woodview, Kilmovee, Ballaghaderreen | €180,000 | 2024-05-09 |
| Woodview, Leckneen, Turlough | €95,000 | 2015-07-21 |
| Worlds End Cottage, Louisburgh, Co Mayo | €306,000 | 2025-08-29 |
| Yellow Bungalow, Carragowan, Bohola | €50,000 | 2015-04-20 |
| Yellow House, New Port Road, Castlebar | €93,500 | 2013-12-19 |
| ~cuilmore, Drummin, Westport | €156,000 | 2013-11-15 |
| Áthan Bui, Falleighter, Aghamore | €165,000 | 2021-02-16 |