| Somerset Bhose | India Standard Time | -09:30 |
| Somerset Midway | Mountain Time | 02:00 |
| Somerset Bhitoli Khurd | India Standard Time | -09:30 |
| Somerset Midway City | Pacific Time | 03:00 |
| Somerset Bhatpachlana | India Standard Time | -09:30 |
| Somerset Middlebury | Eastern Time | 00:00 |
| Somerset Middlefield | Eastern Time | 00:00 |
| Somerset Middle Dural | Eastern Australia Time | -14:00 |
| Somerset Middlesex | Eastern Time | 00:00 |
| Somerset Middleton Saint George | United Kingdom Time | -05:00 |
| Somerset Middletown | Eastern Time | 00:00 |
| Somerset Midhurst | Eastern Time | 00:00 |
| Somerset Midland | Western Australia Time | -12:00 |
| Somerset Midpines | Pacific Time | 03:00 |
| Somerset Midland City | Central Time | 01:00 |
| Somerset Midlothian | Eastern Time | 00:00 |
| Somerset Newport | Eastern Australia Time | -14:00 |
| Somerset Newport News | Eastern Time | 00:00 |
| Somerset Newstead | Eastern Australia Time | -14:00 |
| Somerset Newton Saint Cyres | United Kingdom Time | -05:00 |
| Somerset Nyaung-U | Myanmar Time | -10:30 |
| Somerset Nyaungshwe | Myanmar Time | -10:30 |
| Somerset Oak Hill | Eastern Time | 00:00 |
| Somerset Oak Island | Eastern Time | 00:00 |
| Somerset Oak Park Heights | Central Time | 01:00 |
| Somerset Oak Bluffs | Eastern Time | 00:00 |
| Somerset Oak Brook | Central Time | 01:00 |
| Somerset Oaxaca | Central Time | 01:00 |
| Somerset Oamaru | New Zealand Time | -16:00 |
| Somerset Oakdale | United Kingdom Time | -05:00 |
| Somerset Oakdale | Pacific Time | 03:00 |
| Somerset Oakham | United Kingdom Time | -05:00 |
| Somerset Oakhurst | Pacific Time | 03:00 |
| Somerset Oaklands Park | Central Australia Time | -13:30 |
| Somerset Oberbüren | Central European Time | -06:00 |
| Somerset Oberhausen-Rheinhausen | Central European Time | -06:00 |
| Somerset Oberstaufen | Central European Time | -06:00 |
| Somerset Obertrubach | Central European Time | -06:00 |
| Somerset Oberkorn | Central European Time | -06:00 |
| Somerset Oberlin | Eastern Time | 00:00 |
| Somerset Obernberg am Brenner | Central European Time | -06:00 |
| Somerset Oberwesel | Central European Time | -06:00 |
| Somerset Paia | Hawaii-Aleutian Time | 06:00 |
| Somerset Pāhoa | Hawaii-Aleutian Time | 06:00 |
| Somerset Pakse | Indochina Time | -11:00 |
| Somerset Pakenham | Eastern Australia Time | -14:00 |
| Somerset Paihia | New Zealand Time | -16:00 |
| Somerset Pajaro | Pacific Time | 03:00 |
| Somerset Pak Nam | Indochina Time | -11:00 |
| Somerset New Town | Eastern Australia Time | -14:00 |