| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Palmerstown | city | Mayo | Ireland | 54.22 | -9.27 | 95 | 1583 |
| Palmerstown Bridge | city | Mayo | Ireland | 54.22 | -9.27 | 95 | 1583 |
| Park | city | Mayo | Ireland | 53.91 | -9.20 | 111 | 1826 |
| Parkroy | city | Mayo | Ireland | 53.80 | -9.30 | 180 | 9387 |
| Partry | city | Mayo | Ireland | 53.70 | -9.28 | 173 | 1034 |
| Peenoge | city | Mayo | Ireland | 53.77 | -9.17 | 170 | 1599 |
| Pheasanthill | city | Mayo | Ireland | 53.83 | -9.35 | 209 | 5420 |
| Plota an Bhaireadaigh Thoir | city | Mayo | Ireland | 54.18 | -10.06 | 0 | 745 |
| Plota an Bhairéadaigh Thair | city | Mayo | Ireland | 54.18 | -10.08 | 0 | 692 |
| Poll Raithnà Sweeney | city | Mayo | Ireland | 53.93 | -9.89 | 830 | 569 |
| Poll an Ghearrain | city | Mayo | Ireland | 54.21 | -9.86 | 298 | 771 |
| Poll an tSomais | city | Mayo | Ireland | 54.26 | -9.80 | 242 | 923 |
| Polladoon | city | Mayo | Ireland | 53.76 | -9.35 | 209 | 1188 |
| Pollagarraun | city | Mayo | Ireland | 54.21 | -9.86 | 298 | 771 |
| Pollagh | city | Mayo | Ireland | 53.96 | -9.14 | 65 | 2030 |
| Pollagh | city | Mayo | Ireland | 53.97 | -10.10 | 91 | 430 |
| Pollatomish | city | Mayo | Ireland | 54.26 | -9.80 | 242 | 923 |
| Pollavaddy | city | Mayo | Ireland | 53.81 | -9.11 | 351 | 1921 |
| Pollavullan | city | Mayo | Ireland | 54.30 | -9.41 | 216 | 386 |
| Pollawaddy | city | Mayo | Ireland | 53.77 | -9.31 | 200 | 1917 |
| Pollawarla | city | Mayo | Ireland | 53.99 | -9.31 | 180 | 806 |
| Pollnagawna | city | Mayo | Ireland | 53.94 | -9.06 | 85 | 1733 |
| Pollnashantinny | city | Mayo | Ireland | 54.29 | -9.99 | 22 | 1194 |
| Pollnashelmida | city | Mayo | Ireland | 53.92 | -9.50 | 275 | 1124 |
| Pollranny Sweeny | city | Mayo | Ireland | 53.93 | -9.89 | 830 | 569 |
| Pontoon | city | Mayo | Ireland | 53.98 | -9.21 | 203 | 1385 |
| Port Durlainne | city | Mayo | Ireland | 54.31 | -9.72 | 141 | 343 |
| Port an Chloidh | city | Mayo | Ireland | 54.33 | -9.79 | 410 | 414 |
| Port na Cille | city | Mayo | Ireland | 53.79 | -9.99 | 0 | 154 |
| Portacloy | city | Mayo | Ireland | 54.33 | -9.79 | 410 | 414 |
| Portagh | city | Mayo | Ireland | 53.77 | -9.11 | 830 | 1643 |
| Porteen | city | Mayo | Ireland | 54.02 | -9.98 | 16 | 703 |
| Porteenbeg | city | Mayo | Ireland | 54.12 | -10.21 | 0 | 89 |
| Portnakilly | city | Mayo | Ireland | 53.79 | -9.99 | 0 | 154 |
| Porturlin | city | Mayo | Ireland | 54.31 | -9.72 | 141 | 343 |
| Prospect | city | Mayo | Ireland | 53.77 | -9.59 | 328 | 2563 |
| Prughlish | city | Mayo | Ireland | 53.98 | -9.39 | 242 | 482 |