U.S. state profile · OH
Ohio: area, population and density
Ohio has 40,859 sq mi of land and a 2025 population estimate of 11,900,510; calculated population density is 112 people/km².
Sources: U.S. Census Bureau Gazetteer Files · 2026 · U.S. Census Bureau Population Estimates Program · 2025.
Ohio ranks 35th of 51 by land area, 7th by population and 11th by calculated population density among the U.S. states and DC. Density uses the displayed population divided by land area converted to square kilometres.
- Land area
- 40,859 sq miU.S. Census Bureau Gazetteer Files · 2026
- Population
- 11,900,510U.S. Census Bureau Population Estimates Program · 2025
- Calculated density
- 112 people/km²Population ÷ land area in km²
Reading the figures
Ohio in the U.S. comparison set
Ohio has 40,859 sq mi of land area and a population estimate of 11,900,510 for 2025. In the 51-place state and DC set, it is 35th by land area, 7th by population, and 11th by calculated density.
Density is not a separately reported value here. It is calculated from the population and land area above, converted to square kilometres, so the result can be compared with supported country figures.
U.S. boundary outline: Census TIGER/Line 2025. The drawing is fitted to this profile panel; use a comparison page for a shared-area scale.