The map above shows Missouri and Ohio side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Missouri vs Ohio Geography
Land area: Missouri has a land area of 68,746 square miles (178,052 km²), while Ohio has 40,859 square miles (105,824 km²). Missouri's land area is 1.7 times (68%) larger than Ohio's.
Total area: Missouri: 69,707 square miles (180,540 km²) vs Ohio: 44,826 square miles (116,098 km²), including inland and coastal water. Missouri's total area is 1.6 times (56%) larger than Ohio's.
Length: Missouri is 328 miles (529 km) long from north to south; Ohio is 291 miles (468 km). Missouri's north-south length is 1.1 times (13%) longer than Ohio's.
Width: Missouri spans 437 miles (703 km) east to west; Ohio spans 317 miles (510 km). Missouri's east-west width is 1.4 times (38%) wider than Ohio's.
Highest point: Missouri's highest point is Taum Sauk Mountain at 1,771 feet (540 m); Ohio's is Campbell Hill at 1,547 feet (472 m). Taum Sauk Mountain is 224 feet higher than Campbell Hill.
Lowest point: Missouri's lowest point is St. Francis River at 230 feet; Ohio's is Ohio River at 455 feet. Missouri's lowest point is 225 feet lower.
Missouri vs Ohio Population and History
Population: Missouri has a population of 6,245,466 (2024), while Ohio has 11,883,304 (2024). Ohio's population is 1.9 times (90%) larger than Missouri's.
Population density: Missouri: 90.8 people per square mile vs Ohio: 290.8. Ohio's population density is 3.2 times (220%) higher than Missouri's.
Biggest city: Missouri's biggest city is Kansas City with 516,032 people; Ohio's is Columbus with 933,263. Columbus' population is 1.8 times (81%) larger than Kansas City's.
Largest metro area: Missouri's largest metropolitan area is St. Louis, MO-IL metro area (2,811,927 people) vs Ohio's Cincinnati, OH-KY-IN metro area (2,302,815). St. Louis, MO-IL metro area's population is 1.2 times (22%) larger than Cincinnati, OH-KY-IN metro area's.
History: Missouri: Admitted to the Union on August 10, 1821, as the 24th state. Ohio: Admitted to the Union on March 1, 1803, as the 17th state. In its current form, Ohio is the older of the two by 18 years.
Missouri vs Ohio Economy
GDP: Missouri's GDP is $448.7 billion (2024) vs Ohio's $923.1 billion. Ohio's economic output is 2.1 times (106%) larger than Missouri's.
GDP per capita: Missouri: $71,846 per person vs Ohio: $77,684. Ohio's GDP per capita is 1.1 times (8%) higher than Missouri's.
Average income: Missouri: $64,920 vs Ohio: $64,464 average income per person (per capita personal income). Missouri and Ohio have about the same average income.
Missouri vs Ohio Counties
Number of counties: Missouri has 115 counties, while Ohio has 88. Missouri's county count is 1.3 times (31%) higher than Ohio's.
Biggest county by area: Missouri's largest county is Texas County at 1,177 square miles; Ohio's is Ashtabula County at 702 square miles. Texas County's land area is 1.7 times (68%) larger than Ashtabula County's.
Smallest county by area: Missouri: St. Louis city (62 sq mi) vs Ohio: Lake County (229 sq mi). Lake County's land area is 3.7 times (272%) larger than St. Louis city's.
Most populous county: Missouri: St. Louis County (992,929 people) vs Ohio: Franklin County (1,356,303 people). Franklin County's population is 1.4 times (37%) larger than St. Louis County's.
Least populous county: Missouri: Worth County (1,872 people) vs Ohio: Vinton County (12,545 people). Vinton County's population is 6.7 times (570%) larger than Worth County's.
Richest county: Missouri: St. Louis County ($104,775 per capita income) vs Ohio: Delaware County ($96,573). St. Louis County's income is 1.1 times (8%) richer than Delaware County's.
Poorest county: Missouri: Douglas County ($40,515 per capita income) vs Ohio: Noble County ($34,940). Douglas County's income is 1.2 times (16%) richer than Noble County's.
Missouri vs Ohio Taxes
State income tax: Missouri has a top income tax rate of 4.7%, while Ohio has a top income tax rate of 2.75%. Missouri's top rate is 1.95 percentage points higher.
Property tax: Missouri: 0.79% effective rate vs Ohio: 1.22% of home value per year. Ohio's rate is 0.43 percentage points higher.
Sales tax: Missouri: 8.44% combined state and average local rate vs Ohio: 7.29%. Missouri's combined rate is 1.15 percentage points higher.
Official Websites
Missouri official website · Ohio official website
More Size Comparisons
All Missouri size comparisons · All Ohio 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.