| Saleen, Castlebar | — | 10 |
| Sandymount, Newport | — | 10 |
| Sarsfield Crescent, Charlestown | €175,000 | 15 |
| Sarsfield Manor, Charlestown | — | 10 |
| Sea Wharf, The Quay | €180,000 | 16 |
| Seaview Terrace, Killala | — | 5 |
| Shanaghy Heights, Ballina | — | 9 |
| Shanvallyard, Tourmakeady | — | 6 |
| Shean Abhainn, Castlestreet | €111,429 | 7 |
| Sheeaune, Westport | — | 5 |
| Sheridan Park, Bohola | — | 6 |
| Shore Rd, Belmullet | — | 8 |
| Silverbridge Court, Claremorris | — | 7 |
| Sinolane, Kilmovee | — | 6 |
| Sion Hill, Castlebar | €240,000 | 28 |
| Sion Hill, Pontoon Road | — | 8 |
| Sli Humbert, Castlebar | €308,370 | 5 |
| Slí Humbert, Curragh | €297,357 | 10 |
| Sli na Misean, Carrownalurgan | — | 5 |
| Sli na Misean, West Road | €279,295 | 14 |
| Sli na Misean, Westport | €290,748 | 14 |
| Sliabh Cairn, Kiltimagh | — | 9 |
| Slieve Na Greine, Foxford | €190,000 | 9 |
| Slievemore Holiday Village, Dugort | €185,000 | 11 |
| Snugboro, Castlebar | — | 5 |
| Sonnagh, Charlestown | €90,000 | 7 |
| Spencer Court, Castlebar | €210,000 | 10 |
| Spencer Manor, Castlebar | €200,000 | 24 |
| Spencer Manor, Spencer Park | — | 6 |
| Spencer Manor, Spencer St | — | 14 |
| Spencer Street, Castlebar | €185,000 | 15 |
| Springdale, Claremorris | — | 10 |
| Springdale, Convent Rd | — | 5 |
| Springfield, Castlebar | €200,000 | 9 |
| Springfield Court, Castlebar | €148,000 | 21 |
| Srah, Claremorris | — | 5 |
| Srahanarry, Bangor Erris | — | 6 |
| St Bridget's Crescent, Castlebar | — | 12 |
| St Mary's Crescent, Westport | — | 12 |
| St Marys Road, Shrule | — | 6 |
| St Patrick's Terrace, Westport | €241,500 | 12 |
| St Patricks Ave, Crossmolina | — | 8 |
| St Patricks Terrace, Killala Rd | — | 6 |
| St. Mary's Park, Crossmolina | — | 9 |
| St. Muredachs Terrace, Ballina | €82,500 | 20 |
| St. Patrick's Avenue, Castlebar | €235,000 | 12 |
| St. Patrick's Estate, Ballina | — | 12 |
| Station Rise, Ballyhaunis | — | 8 |
| Station Road, Balla | — | 11 |
| Station Road, Ballina | — | 7 |
| Station Road, Castlebar | €197,500 | 18 |
| Station Road, Swinford | — | 5 |
| Station View, Kiltimagh | — | 5 |
| Stephens Place, Spencer St | — | 5 |
| Stonehall, Foxford | — | 6 |
| Streamstown, Westport | — | 10 |
| Summerfield, Castlebar | €267,500 | 26 |
| Surgeview, Blacksod | — | 5 |
| Swinford Road, Foxford | €120,000 | 11 |
| The Sandybanks, Keel | — | 12 |
| The Shores, Annagh Village | — | 5 |
| The Spires, Church Road | €210,000 | 20 |
| The Square, Balla | — | 6 |
| The Sycamores, Cluain na Ri | — | 5 |