The map above shows Missouri and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Missouri vs Oklahoma Geography
Land area: Missouri has a land area of 68,746 square miles (178,052 km²), while Oklahoma has 68,597 square miles (177,665 km²). Missouri and Oklahoma have about the same land area.
Total area: Missouri: 69,707 square miles (180,540 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. Missouri and Oklahoma have about the same total area.
Length: Missouri is 328 miles (529 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 1.6 times (63%) longer than Missouri's.
Width: Missouri spans 437 miles (703 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 1.1 times (12%) wider than Missouri's.
Highest point: Missouri's highest point is Taum Sauk Mountain at 1,771 feet (540 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 3,209 feet higher than Taum Sauk Mountain.
Lowest point: Missouri's lowest point is St. Francis River at 230 feet; Oklahoma's is Little River at 289 feet. Missouri's lowest point is 59 feet lower.
Missouri vs Oklahoma Population and History
Population: Missouri has a population of 6,245,466 (2024), while Oklahoma has 4,095,393 (2024). Missouri's population is 1.5 times (52%) larger than Oklahoma's.
Population density: Missouri: 90.8 people per square mile vs Oklahoma: 59.7. Missouri's population density is 1.5 times (52%) higher than Oklahoma's.
Biggest city: Missouri's biggest city is Kansas City with 516,032 people; Oklahoma's is Oklahoma City with 712,919. Oklahoma City's population is 1.4 times (38%) 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 Oklahoma's Oklahoma City, OK metro area (1,497,821). St. Louis, MO-IL metro area's population is 1.9 times (88%) larger than Oklahoma City, OK metro area's.
History: Missouri: Admitted to the Union on August 10, 1821, as the 24th state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, Missouri is the older of the two by 86 years.
Missouri vs Oklahoma Economy
GDP: Missouri's GDP is $448.7 billion (2024) vs Oklahoma's $263.7 billion. Missouri's economic output is 1.7 times (70%) larger than Oklahoma's.
GDP per capita: Missouri: $71,846 per person vs Oklahoma: $64,388. Missouri's GDP per capita is 1.1 times (12%) higher than Oklahoma's.
Average income: Missouri: $64,920 vs Oklahoma: $63,708 average income per person (per capita personal income). Missouri and Oklahoma have about the same average income.
Missouri vs Oklahoma Counties
Number of counties: Missouri has 115 counties, while Oklahoma has 77. Missouri's county count is 1.5 times (49%) higher than Oklahoma's.
Biggest county by area: Missouri's largest county is Texas County at 1,177 square miles; Oklahoma's is Osage County at 2,247 square miles. Osage County's land area is 1.9 times (91%) larger than Texas County's.
Smallest county by area: Missouri: St. Louis city (62 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 6.0 times (502%) larger than St. Louis city's.
Most populous county: Missouri: St. Louis County (992,929 people) vs Oklahoma: Oklahoma County (816,490 people). St. Louis County's population is 1.2 times (22%) larger than Oklahoma County's.
Least populous county: Missouri: Worth County (1,872 people) vs Oklahoma: Cimarron County (2,133 people). Cimarron County's population is 1.1 times (14%) larger than Worth County's.
Richest county: Missouri: St. Louis County ($104,775 per capita income) vs Oklahoma: Washington County ($126,749). Washington County's income is 1.2 times (21%) richer than St. Louis County's.
Poorest county: Missouri: Douglas County ($40,515 per capita income) vs Oklahoma: Atoka County ($38,709). Douglas County and Atoka County have about the same income.
Missouri vs Oklahoma Taxes
State income tax: Missouri has a top income tax rate of 4.7%, while Oklahoma has a top income tax rate of 4.5%. Missouri's top rate is 0.2 percentage points higher.
Property tax: Missouri: 0.79% effective rate vs Oklahoma: 0.75% of home value per year. Missouri's rate is 0.04 percentage points higher.
Sales tax: Missouri: 8.44% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 0.62 percentage points higher.
Official Websites
Missouri official website · Oklahoma official website
More Size Comparisons
All Missouri 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.