| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Baile Chathail | city | Mayo | Ireland | 53.96 | -8.79 | 249 | 1782 |
| Baile Chruaich | city | Mayo | Ireland | 54.02 | -9.83 | 275 | 212 |
| Baile Easa Caoire | city | Mayo | Ireland | 54.18 | -9.18 | 6 | 1452 |
| Baile Mhic Sheathruin | city | Mayo | Ireland | 54.20 | -10.05 | 0 | 911 |
| Baile Ui Fhiachain | city | Mayo | Ireland | 53.89 | -9.55 | 62 | 1514 |
| Baile an Chaisil | city | Mayo | Ireland | 54.28 | -9.37 | 255 | 550 |
| Baile an Daighin | city | Mayo | Ireland | 53.67 | -8.97 | 314 | 2653 |
| Baile an Léana | city | Mayo | Ireland | 54.27 | -9.23 | 3 | 760 |
| Baile an Roba | city | Mayo | Ireland | 53.63 | -9.23 | 147 | 3060 |
| Baile an Tobair | city | Mayo | Ireland | 53.73 | -9.30 | 193 | 1142 |
| Baile na Cora | city | Mayo | Ireland | 53.80 | -9.21 | 147 | 2249 |
| Baingear | city | Mayo | Ireland | 54.14 | -9.74 | 314 | 462 |
| Balisakeery | city | Mayo | Ireland | 54.18 | -9.18 | 6 | 1452 |
| Balla | city | Mayo | Ireland | 53.80 | -9.13 | 830 | 1976 |
| Ballaghfarna | city | Mayo | Ireland | 53.79 | -9.23 | 150 | 2016 |
| Ballina | city | Mayo | Ireland | 54.13 | -9.81 | 203 | 463 |
| Ballina | city | Mayo | Ireland | 54.12 | -9.17 | 19 | 10932 |
| Ballinafad | city | Mayo | Ireland | 53.78 | -9.18 | 160 | 1601 |
| Ballinagran | city | Mayo | Ireland | 53.82 | -9.11 | 255 | 1945 |
| Ballinapark | city | Mayo | Ireland | 54.31 | -9.57 | 91 | 119 |
| Ballindangan | city | Mayo | Ireland | 53.67 | -8.97 | 314 | 2653 |
| Ballindine | city | Mayo | Ireland | 53.67 | -8.97 | 314 | 2653 |
| Ballingarden | city | Mayo | Ireland | 53.94 | -9.19 | 85 | 1355 |
| Ballinglen | city | Mayo | Ireland | 54.26 | -9.38 | 164 | 588 |
| Ballinhoe | city | Mayo | Ireland | 53.84 | -9.16 | 272 | 2063 |
| Ballinlassa | city | Mayo | Ireland | 53.81 | -9.20 | 173 | 2055 |
| Ballinlassa | city | Mayo | Ireland | 53.79 | -9.26 | 167 | 2701 |
| Ballinlena | city | Mayo | Ireland | 54.27 | -9.23 | 3 | 760 |
| Ballinlough | city | Mayo | Ireland | 53.83 | -9.51 | 193 | 7653 |
| Ballinlough | city | Mayo | Ireland | 53.80 | -9.06 | 305 | 1531 |
| Ballinrobe | city | Mayo | Ireland | 53.63 | -9.23 | 147 | 3060 |
| Ballintleva | city | Mayo | Ireland | 53.78 | -9.08 | 830 | 1592 |
| Ballintleva | city | Mayo | Ireland | 53.84 | -9.46 | 190 | 2307 |
| Ballintober | city | Mayo | Ireland | 53.73 | -9.30 | 193 | 1142 |
| Ballintubber | city | Mayo | Ireland | 53.73 | -9.30 | 193 | 1142 |
| Ballinvilla | city | Mayo | Ireland | 53.88 | -9.26 | 141 | 11357 |
| Ballinville | city | Mayo | Ireland | 53.88 | -9.26 | 141 | 11357 |
| Ballinvoash | city | Mayo | Ireland | 53.86 | -9.22 | 127 | 3733 |
| Ballinvoash Lough | city | Mayo | Ireland | 53.86 | -9.22 | 127 | 3257 |
| Ballinvoy | city | Mayo | Ireland | 53.78 | -9.47 | 213 | 4113 |
| Balloor | city | Mayo | Ireland | 53.87 | -9.16 | 219 | 2043 |
| Balloor | city | Mayo | Ireland | 53.84 | -9.27 | 147 | 12195 |
| Balloor West | city | Mayo | Ireland | 53.78 | -9.39 | 367 | 1298 |
| Ballyart | city | Mayo | Ireland | 53.91 | -9.19 | 104 | 1810 |
| Ballybranagh | city | Mayo | Ireland | 54.09 | -9.39 | 173 | 1153 |
| Ballycarha | city | Mayo | Ireland | 53.79 | -9.25 | 160 | 2505 |
| Ballycarra | city | Mayo | Ireland | 53.80 | -9.21 | 147 | 2249 |
| Ballycastle | city | Mayo | Ireland | 54.28 | -9.37 | 255 | 550 |
| Ballycroy | city | Mayo | Ireland | 54.02 | -9.83 | 275 | 212 |
| Ballyduffy | city | Mayo | Ireland | 54.04 | -9.34 | 157 | 1218 |
| Ballyfanoher | city | Mayo | Ireland | 54.30 | -9.40 | 85 | 410 |
| Ballygarries | city | Mayo | Ireland | 53.68 | -9.18 | 164 | 1614 |
| Ballygarriff | city | Mayo | Ireland | 53.92 | -9.20 | 101 | 1493 |
| Ballygarris | city | Mayo | Ireland | 53.68 | -9.18 | 164 | 1614 |
| Ballyglass | city | Mayo | Ireland | 54.15 | -9.35 | 183 | 1169 |
| Ballyglass | city | Mayo | Ireland | 53.73 | -9.17 | 177 | 1294 |
| Ballyglass | city | Mayo | Ireland | 54.26 | -9.91 | 3 | 928 |
| Ballyglass | city | Mayo | Ireland | 53.84 | -9.44 | 187 | 2109 |
| Ballyglass | city | Mayo | Ireland | 54.23 | -9.32 | 206 | 1199 |
| Ballygommon | city | Mayo | Ireland | 53.88 | -9.17 | 187 | 2063 |
| Ballyguin | city | Mayo | Ireland | 53.90 | -9.20 | 114 | 2216 |
| Ballyhaunis | city | Mayo | Ireland | 53.77 | -8.77 | 239 | 3153 |
| Ballyhean | city | Mayo | Ireland | 53.79 | -9.31 | 196 | 5493 |
| Ballyhenry | city | Mayo | Ireland | 53.55 | -9.12 | 190 | 1893 |
| Ballykill | city | Mayo | Ireland | 53.83 | -9.24 | 144 | 7525 |
| Ballyknock | city | Mayo | Ireland | 53.97 | -9.31 | 370 | 580 |
| Ballylassa | city | Mayo | Ireland | 53.58 | -9.17 | 164 | 2094 |
| Ballymackeogh | city | Mayo | Ireland | 53.78 | -9.13 | 344 | 1806 |
| Ballymacloughlin | city | Mayo | Ireland | 53.81 | -9.11 | 351 | 1952 |
| Ballymacrah | city | Mayo | Ireland | 53.84 | -9.34 | 193 | 10484 |
| Ballymacredmona | city | Mayo | Ireland | 54.05 | -9.17 | 98 | 2870 |
| Ballymacsherron | city | Mayo | Ireland | 54.20 | -10.05 | 0 | 911 |
| Ballymiles Bridge | city | Mayo | Ireland | 53.91 | -9.02 | 95 | 2106 |
| Ballynaboll | city | Mayo | Ireland | 53.84 | -9.33 | 183 | 11357 |
| Ballynacarriga | city | Mayo | Ireland | 53.83 | -9.44 | 193 | 2320 |
| Ballynafulla | city | Mayo | Ireland | 54.02 | -9.39 | 830 | 640 |
| Ballynagoraher | city | Mayo | Ireland | 53.99 | -9.36 | 170 | 621 |
| Ballynalty | city | Mayo | Ireland | 53.50 | -9.20 | 88 | 1466 |
| Ballynamarroge | city | Mayo | Ireland | 53.81 | -9.37 | 249 | 1752 |
| Ballynarick | city | Mayo | Ireland | 54.24 | -9.21 | 0 | 1133 |
| Ballynastangford | city | Mayo | Ireland | 53.75 | -9.03 | 242 | 3082 |
| Ballynastrangford | city | Mayo | Ireland | 53.75 | -9.03 | 242 | 3082 |
| Ballyneety Cross Roads | city | Mayo | Ireland | 54.13 | -9.28 | 118 | 1676 |
| Ballynew | city | Mayo | Ireland | 53.87 | -9.26 | 137 | 11868 |
| Ballyrourke | city | Mayo | Ireland | 53.81 | -9.13 | 377 | 2001 |
| Ballysakeery | city | Mayo | Ireland | 54.18 | -9.18 | 6 | 1452 |
| Ballyshane | city | Mayo | Ireland | 53.83 | -9.22 | 141 | 3351 |
| Ballyteige | city | Mayo | Ireland | 53.93 | -9.43 | 173 | 591 |
| Ballytoohy | city | Mayo | Ireland | 53.81 | -9.98 | 9 | 146 |
| Ballyvary | city | Mayo | Ireland | 53.89 | -9.15 | 203 | 1810 |
| Bangor | city | Mayo | Ireland | 54.14 | -9.74 | 314 | 462 |
| Bangor Erris | city | Mayo | Ireland | 54.14 | -9.74 | 314 | 462 |
| Baralty | city | Mayo | Ireland | 54.26 | -9.65 | 364 | 283 |
| Barnacahoge | city | Mayo | Ireland | 53.92 | -8.87 | 830 | 2106 |
| Barnacuille | city | Mayo | Ireland | 54.27 | -9.82 | 209 | 891 |
| Barnatra | city | Mayo | Ireland | 54.22 | -9.84 | 239 | 864 |
| Barney | city | Mayo | Ireland | 53.82 | -9.23 | 144 | 4659 |
| Barnycarroll | city | Mayo | Ireland | 53.75 | -8.95 | 262 | 2657 |
| Barr Alltai | city | Mayo | Ireland | 54.26 | -9.65 | 364 | 283 |
| Barr Ruscai | city | Mayo | Ireland | 54.21 | -9.62 | 830 | 87 |
| Barr Thrá | city | Mayo | Ireland | 54.25 | -9.98 | 6 | 1837 |
| Barr na Cáóige | city | Mayo | Ireland | 53.92 | -8.87 | 830 | 2106 |
| Barr na Trá | city | Mayo | Ireland | 54.22 | -9.84 | 239 | 864 |
| Barrack | city | Mayo | Ireland | 54.16 | -10.09 | 0 | 714 |
| Barrackland | city | Mayo | Ireland | 53.84 | -9.18 | 177 | 2230 |
| Barranagh East | city | Mayo | Ireland | 54.17 | -10.06 | 0 | 717 |
| Barranagh West | city | Mayo | Ireland | 54.17 | -10.08 | 3 | 693 |
| Barreitsplot East | city | Mayo | Ireland | 54.18 | -10.06 | 0 | 745 |
| Barrettsplot West | city | Mayo | Ireland | 54.18 | -10.08 | 0 | 692 |
| Barroe | city | Mayo | Ireland | 53.96 | -8.71 | 380 | 1483 |
| Barroosky | city | Mayo | Ireland | 54.21 | -9.62 | 830 | 87 |
| Bartrauve | city | Mayo | Ireland | 54.25 | -9.98 | 6 | 1837 |