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 | Official name: State of Ohio Ohio postal code abbreviation: OH You may also be interested in the answers to the following questions: Total area: 116 096 km2 ✅ What is the largest city by population in Ohio?- Largest Ohio cities by population: Cleveland ✅ What is the capital of Ohio?- State capital of Ohio: Columbus ✅ What is the population of Ohio?- Ohio state population 2025: 11 544 951 |