The map above shows Ohio and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Ohio vs Oklahoma Geography
Land area: Ohio has a land area of 40,859 square miles (105,824 km²), while Oklahoma has 68,597 square miles (177,665 km²). Oklahoma's land area is 1.7 times (68%) larger than Ohio's.
Total area: Ohio: 44,826 square miles (116,098 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. Oklahoma's total area is 1.6 times (56%) larger than Ohio's.
Length: Ohio is 291 miles (468 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 1.8 times (83%) longer than Ohio's.
Width: Ohio spans 317 miles (510 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 1.5 times (55%) wider than Ohio's.
Highest point: Ohio's highest point is Campbell Hill at 1,547 feet (472 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 3,433 feet higher than Campbell Hill.
Lowest point: Ohio's lowest point is Ohio River at 455 feet; Oklahoma's is Little River at 289 feet. Oklahoma's lowest point is 166 feet lower.
Ohio vs Oklahoma Population and History
Population: Ohio has a population of 11,883,304 (2024), while Oklahoma has 4,095,393 (2024). Ohio's population is 2.9 times (190%) larger than Oklahoma's.
Population density: Ohio: 290.8 people per square mile vs Oklahoma: 59.7. Ohio's population density is 4.9 times (387%) higher than Oklahoma's.
Biggest city: Ohio's biggest city is Columbus with 933,263 people; Oklahoma's is Oklahoma City with 712,919. Columbus' population is 1.3 times (31%) larger than Oklahoma City's.
Largest metro area: Ohio's largest metropolitan area is Cincinnati, OH-KY-IN metro area (2,302,815 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Cincinnati, OH-KY-IN metro area's population is 1.5 times (54%) larger than Oklahoma City, OK metro area's.
History: Ohio: Admitted to the Union on March 1, 1803, as the 17th state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, Ohio is the older of the two by 104 years.
Ohio vs Oklahoma Economy
GDP: Ohio's GDP is $923.1 billion (2024) vs Oklahoma's $263.7 billion. Ohio's economic output is 3.5 times (250%) larger than Oklahoma's.
GDP per capita: Ohio: $77,684 per person vs Oklahoma: $64,388. Ohio's GDP per capita is 1.2 times (21%) higher than Oklahoma's.
Average income: Ohio: $64,464 vs Oklahoma: $63,708 average income per person (per capita personal income). Ohio and Oklahoma have about the same average income.
Ohio vs Oklahoma Counties
Number of counties: Ohio has 88 counties, while Oklahoma has 77. Ohio's county count is 1.1 times (14%) higher than Oklahoma's.
Biggest county by area: Ohio's largest county is Ashtabula County at 702 square miles; Oklahoma's is Osage County at 2,247 square miles. Osage County's land area is 3.2 times (220%) larger than Ashtabula County's.
Smallest county by area: Ohio: Lake County (229 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 1.6 times (62%) larger than Lake County's.
Most populous county: Ohio: Franklin County (1,356,303 people) vs Oklahoma: Oklahoma County (816,490 people). Franklin County's population is 1.7 times (66%) larger than Oklahoma County's.
Least populous county: Ohio: Vinton County (12,545 people) vs Oklahoma: Cimarron County (2,133 people). Vinton County's population is 5.9 times (488%) larger than Cimarron County's.
Richest county: Ohio: Delaware County ($96,573 per capita income) vs Oklahoma: Washington County ($126,749). Washington County's income is 1.3 times (31%) richer than Delaware County's.
Poorest county: Ohio: Noble County ($34,940 per capita income) vs Oklahoma: Atoka County ($38,709). Atoka County's income is 1.1 times (11%) richer than Noble County's.
Ohio vs Oklahoma Taxes
State income tax: Ohio has a top income tax rate of 2.75%, while Oklahoma has a top income tax rate of 4.5%. Oklahoma's top rate is 1.75 percentage points higher.
Property tax: Ohio: 1.22% effective rate vs Oklahoma: 0.75% of home value per year. Ohio's rate is 0.47 percentage points higher.
Sales tax: Ohio: 7.29% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 1.77 percentage points higher.
Official Websites
Ohio official website · Oklahoma official website
More Size Comparisons
All Ohio size comparisons · All Oklahoma size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.