| Padstow | (SW9175) | Cornwall | England | |
| Pagnell, Hooton | (SE4808) | Yorkshire - West Riding | England | |
| Painswick | (SO8609) | Gloucestershire | England | |
| Pancras, St | (TQ2982) | London | England | |
| Park, Normanton | (SK9306) | Rutland | England | |
| Pass, Poyntz | (J0539) | Armagh | Ireland | |
| Patrick, Preston | (SD5585) | Westmorland | England | |
| Pattishall | (SP6754) | Northamptonshire and the Soke of Peterborough | England | |
| Peakirk | (TF1606) | Northamptonshire and the Soke of Peterborough | England | |
| Peebles | (NT2540) | Peeblesshire | Scotland | |
| Pelsall | (SK0203) | Staffordshire | England | |
| Pendleton | (SD8100) | Lancashire | England | |
| Penistone | (SE2403) | Yorkshire - West Riding | England | |
| Penkridge | (SJ9214) | Staffordshire | England | |
| Penn | (SU9193) | Buckinghamshire | England | |
| Pennington | (SD2677) | Lancashire | England | |
| Penny Bridge | (SD3082) | Lancashire | England | |
| Penponds | (SW6339) | Cornwall | England | |
| Penpont | (SX0874) | Cornwall | England | |
| Penrose | (SW8770) | Cornwall | England | |
| Pensilva | (SX2969) | Cornwall | England | |
| Peterborough | (TL1998) | Northamptonshire and the Soke of Peterborough | England | |
| Pettigoe | (H1166) | Fermanagh | Ireland | |
| Petworth | (SU9721) | Sussex | England | |
| Philadelphia | (39.99800, -75.14500) | Pennsylvania | United States of America | |
| Phillips | (17.35830, -62.76130) | St Kitts | Leeward Islands | |
| Piercebridge | (NZ2115) | Durham | England | |
| Pilgrim's Hatch | (TQ5795) | Essex | England | |
| Pillerton | (SP2948) | Warwickshire | England | |
| Pilling | (SD4048) | Lancashire | England | |
| Pinner | (TQ1289) | Middlesex | England | |
| Pinxton | (SK4554) | Derbyshire | England | |
| Plumtree | (SK6133) | Nottinghamshire | England | |
| Polperro | (SX2151) | Cornwall | England | |
| Ponton, Little | (SK9312) | Lincolnshire | England | |
| Poole | (SZ0190) | Dorset | England | |
| Poppleton, Nether | (SE5654) | Yorkshire - West Riding | England | |
| Portslade | (TQ2506) | Sussex | England | |
| Portsmouth | (SU6501) | Hampshire and the Isle of Wight | England | |
| Potterne | (ST9958) | Wiltshire | England | |
| Poulpeasty | (S9024) | Wexford | Ireland | |
| Power, Guiting | (SP0924) | Gloucestershire | England | |
| Poyntz Pass | (J0539) | Armagh | Ireland | |
| Preston | (SD5329) | Lancashire | England | |
| Preston Patrick | (SD5585) | Westmorland | England | |
| Preston, East | (TQ0701) | Sussex | England | |
| Prestonpans | (NT3874) | East Lothian | Scotland | |
| Prestwich | (SD8103) | Lancashire | England | |
| Priestland | (C9238) | Antrim | Ireland | |
| Prior, Cleeve | (SP0849) | Worcestershire | England | |
| Priors, Salford | (SP0751) | Warwickshire | England | |
| Puncknowle | (SY5388) | Dorset | England | |
| Pusey | (SU3596) | Berkshire | England |