The map above shows Kansas and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Kansas vs Oklahoma Geography
Land area: Kansas has a land area of 81,759 square miles (211,754 km²), while Oklahoma has 68,597 square miles (177,665 km²). Kansas' land area is 1.2 times (19%) larger than Oklahoma's.
Total area: Kansas: 82,278 square miles (213,100 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. Kansas' total area is 1.2 times (18%) larger than Oklahoma's.
Length: Kansas is 207 miles (334 km) long from north to south; Oklahoma is 533 miles (857 km). Oklahoma's north-south length is 2.6 times (157%) longer than Kansas'.
Width: Kansas spans 401 miles (645 km) east to west; Oklahoma spans 490 miles (789 km). Oklahoma's east-west width is 1.2 times (22%) wider than Kansas'.
Highest point: Kansas's highest point is Mount Sunflower at 4,040 feet (1,231 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Black Mesa is 940 feet higher than Mount Sunflower.
Lowest point: Kansas's lowest point is Verdigris River at 679 feet; Oklahoma's is Little River at 289 feet. Oklahoma's lowest point is 390 feet lower.
Kansas vs Oklahoma Population and History
Population: Kansas has a population of 2,970,606 (2024), while Oklahoma has 4,095,393 (2024). Oklahoma's population is 1.4 times (38%) larger than Kansas'.
Population density: Kansas: 36.3 people per square mile vs Oklahoma: 59.7. Oklahoma's population density is 1.6 times (64%) higher than Kansas'.
Biggest city: Kansas's biggest city is Wichita with 400,991 people; Oklahoma's is Oklahoma City with 712,919. Oklahoma City's population is 1.8 times (78%) larger than Wichita's.
Largest metro area: Kansas's largest metropolitan area is Kansas City, MO-KS metro area (2,253,579 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Kansas City, MO-KS metro area's population is 1.5 times (50%) larger than Oklahoma City, OK metro area's.
History: Kansas: Admitted to the Union on January 29, 1861, as the 34th state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, Kansas is the older of the two by 46 years.
Kansas vs Oklahoma Economy
GDP: Kansas's GDP is $230.5 billion (2024) vs Oklahoma's $263.7 billion. Oklahoma's economic output is 1.1 times (14%) larger than Kansas'.
GDP per capita: Kansas: $77,601 per person vs Oklahoma: $64,388. Kansas' GDP per capita is 1.2 times (21%) higher than Oklahoma's.
Average income: Kansas: $65,856 vs Oklahoma: $63,708 average income per person (per capita personal income). Kansas and Oklahoma have about the same average income.
Kansas vs Oklahoma Counties
Number of counties: Kansas has 105 counties, while Oklahoma has 77. Kansas' county count is 1.4 times (36%) higher than Oklahoma's.
Biggest county by area: Kansas's largest county is Butler County at 1,430 square miles; Oklahoma's is Osage County at 2,247 square miles. Osage County's land area is 1.6 times (57%) larger than Butler County's.
Smallest county by area: Kansas: Wyandotte County (152 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 2.5 times (145%) larger than Wyandotte County's.
Most populous county: Kansas: Johnson County (632,276 people) vs Oklahoma: Oklahoma County (816,490 people). Oklahoma County's population is 1.3 times (29%) larger than Johnson County's.
Least populous county: Kansas: Greeley County (1,152 people) vs Oklahoma: Cimarron County (2,133 people). Cimarron County's population is 1.9 times (85%) larger than Greeley County's.
Richest county: Kansas: Greeley County ($134,780 per capita income) vs Oklahoma: Washington County ($126,749). Greeley County's income is 1.1 times (6%) richer than Washington County's.
Poorest county: Kansas: Wyandotte County ($42,878 per capita income) vs Oklahoma: Atoka County ($38,709). Wyandotte County's income is 1.1 times (11%) richer than Atoka County's.
Kansas vs Oklahoma Taxes
State income tax: Kansas has a top income tax rate of 5.58%, while Oklahoma has a top income tax rate of 4.5%. Kansas's top rate is 1.08 percentage points higher.
Property tax: Kansas: 1.25% effective rate vs Oklahoma: 0.75% of home value per year. Kansas's rate is 0.5 percentage points higher.
Sales tax: Kansas: 8.71% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 0.35 percentage points higher.
Official Websites
Kansas official website · Oklahoma official website
More Size Comparisons
All Kansas 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.