The map above shows Kansas and Missouri side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Kansas vs Missouri Geography
Land area: Kansas has a land area of 81,759 square miles (211,754 km²), while Missouri has 68,746 square miles (178,052 km²). Kansas' land area is 1.2 times (19%) larger than Missouri's.
Total area: Kansas: 82,278 square miles (213,100 km²) vs Missouri: 69,707 square miles (180,540 km²), including inland and coastal water. Kansas' total area is 1.2 times (18%) larger than Missouri's.
Length: Kansas is 207 miles (334 km) long from north to south; Missouri is 328 miles (529 km). Missouri's north-south length is 1.6 times (58%) longer than Kansas'.
Width: Kansas spans 401 miles (645 km) east to west; Missouri spans 437 miles (703 km). Missouri's east-west width is 1.1 times (9%) wider than Kansas'.
Highest point: Kansas's highest point is Mount Sunflower at 4,040 feet (1,231 m); Missouri's is Taum Sauk Mountain at 1,771 feet (540 m). Mount Sunflower is 2,269 feet higher than Taum Sauk Mountain.
Lowest point: Kansas's lowest point is Verdigris River at 679 feet; Missouri's is St. Francis River at 230 feet. Missouri's lowest point is 449 feet lower.
Kansas vs Missouri Population and History
Population: Kansas has a population of 2,970,606 (2024), while Missouri has 6,245,466 (2024). Missouri's population is 2.1 times (110%) larger than Kansas'.
Population density: Kansas: 36.3 people per square mile vs Missouri: 90.8. Missouri's population density is 2.5 times (150%) higher than Kansas'.
Biggest city: Kansas's biggest city is Wichita with 400,991 people; Missouri's is Kansas City with 516,032. Kansas City's population is 1.3 times (29%) larger than Wichita's.
Largest metro area: Kansas's largest metropolitan area is Kansas City, MO-KS metro area (2,253,579 people) vs Missouri's St. Louis, MO-IL metro area (2,811,927). St. Louis, MO-IL metro area's population is 1.2 times (25%) larger than Kansas City, MO-KS metro area's.
History: Kansas: Admitted to the Union on January 29, 1861, as the 34th state. Missouri: Admitted to the Union on August 10, 1821, as the 24th state. In its current form, Missouri is the older of the two by 40 years.
Kansas vs Missouri Economy
GDP: Kansas's GDP is $230.5 billion (2024) vs Missouri's $448.7 billion. Missouri's economic output is 1.9 times (95%) larger than Kansas'.
GDP per capita: Kansas: $77,601 per person vs Missouri: $71,846. Kansas' GDP per capita is 1.1 times (8%) higher than Missouri's.
Average income: Kansas: $65,856 vs Missouri: $64,920 average income per person (per capita personal income). Kansas and Missouri have about the same average income.
Kansas vs Missouri Counties
Number of counties: Kansas has 105 counties, while Missouri has 115. Missouri's county count is 1.1 times (10%) higher than Kansas'.
Biggest county by area: Kansas's largest county is Butler County at 1,430 square miles; Missouri's is Texas County at 1,177 square miles. Butler County's land area is 1.2 times (21%) larger than Texas County's.
Smallest county by area: Kansas: Wyandotte County (152 sq mi) vs Missouri: St. Louis city (62 sq mi). Wyandotte County's land area is 2.5 times (146%) larger than St. Louis city's.
Most populous county: Kansas: Johnson County (632,276 people) vs Missouri: St. Louis County (992,929 people). St. Louis County's population is 1.6 times (57%) larger than Johnson County's.
Least populous county: Kansas: Greeley County (1,152 people) vs Missouri: Worth County (1,872 people). Worth County's population is 1.6 times (63%) larger than Greeley County's.
Richest county: Kansas: Greeley County ($134,780 per capita income) vs Missouri: St. Louis County ($104,775). Greeley County's income is 1.3 times (29%) richer than St. Louis County's.
Poorest county: Kansas: Wyandotte County ($42,878 per capita income) vs Missouri: Douglas County ($40,515). Wyandotte County's income is 1.1 times (6%) richer than Douglas County's.
Kansas vs Missouri Taxes
State income tax: Kansas has a top income tax rate of 5.58%, while Missouri has a top income tax rate of 4.7%. Kansas's top rate is 0.88 percentage points higher.
Property tax: Kansas: 1.25% effective rate vs Missouri: 0.79% of home value per year. Kansas's rate is 0.46 percentage points higher.
Sales tax: Kansas: 8.71% combined state and average local rate vs Missouri: 8.44%. Kansas's combined rate is 0.27 percentage points higher.
Official Websites
Kansas official website · Missouri official website
More Size Comparisons
All Kansas size comparisons · All Missouri 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.