| Ohio Abanilla | Central European Time | -06:00 |
| Ohio Aberlady | United Kingdom Time | -05:00 |
| Ohio Abisko | Central European Time | -06:00 |
| Ohio Abingdon | Eastern Time | 00:00 |
| Ohio Abington | Eastern Time | 00:00 |
| Ohio Aberdeen | Central Time | 01:00 |
| Ohio Abeibara | Greenwich Mean Time | -05:00 |
| Ohio Abbotsford | Eastern Australia Time | -16:00 |
| Ohio Ajijic | Central Time | 01:00 |
| Ohio Akköy | Turkey Time | -08:00 |
| Ohio Al Aaroui | Western European Time | -06:00 |
| Ohio Akrotiri | Eastern European Time | -07:00 |
| Ohio Aigle | Central European Time | -06:00 |
| Ohio Aiea | Hawaii-Aleutian Time | 05:00 |
| Ohio Agurain | Central European Time | -06:00 |
| Ohio Aitkenvale | Eastern Australia Time | -15:00 |
| Ohio Airport West | Eastern Australia Time | -16:00 |
| Ohio Air Itam | Malaysia Time | -13:00 |
| Ohio Ajanta | India Standard Time | -10:30 |
| Ohio Alenquer | Western European Time | -05:00 |
| Ohio Alconaba | Central European Time | -06:00 |
| Ohio Alcochete | Western European Time | -05:00 |
| Ohio Alcanar | Central European Time | -06:00 |
| Ohio Alexander Heights | Western Australia Time | -13:00 |
| Ohio Alexandria Bay | Eastern Time | 00:00 |
| Ohio Algood | Central Time | 01:00 |
| Ohio Algiers | South Africa Standard Time | -07:00 |
| Ohio Algoma | Central Time | 01:00 |
| Ohio Alfonso Lista | Philippine Time | -13:00 |
| Ohio Alfornelos | Western European Time | -05:00 |
| Ohio Alger Centre | Central European Time | -06:00 |
| Ohio Algerias | Colombia Time | 00:00 |
| Ohio Algermissen | Central European Time | -06:00 |
| Ohio Al Mudayq | Gulf Standard Time | -09:00 |
| Ohio Al Jaradiyah | Arabian Time | -08:00 |
| Ohio Al-Mamurah | Central European Time | -06:00 |
| Ohio Al Jaghbub | Eastern European Time | -07:00 |
| Ohio Al Hofuf | Arabian Time | -08:00 |