The map above shows Kansas and Washington side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Kansas vs Washington Geography
Land area: Kansas has a land area of 81,759 square miles (211,754 km²), while Washington has 66,455 square miles (172,119 km²). Kansas' land area is 1.2 times (23%) larger than Washington's.
Total area: Kansas: 82,278 square miles (213,100 km²) vs Washington: 71,301 square miles (184,668 km²), including inland and coastal water. Kansas' total area is 1.2 times (15%) larger than Washington's.
Length: Kansas is 207 miles (334 km) long from north to south; Washington is 238 miles (383 km). Washington's north-south length is 1.1 times (15%) longer than Kansas'.
Width: Kansas spans 401 miles (645 km) east to west; Washington spans 399 miles (641 km). Kansas and Washington have about the same east-west width.
Highest point: Kansas's highest point is Mount Sunflower at 4,040 feet (1,231 m); Washington's is Mount Rainier at 14,409 feet (4,392 m). Mount Rainier is 10,369 feet higher than Mount Sunflower.
Lowest point: Kansas's lowest point is Verdigris River at 679 feet; Washington's is Pacific Ocean at 0 feet. Washington's lowest point is 679 feet lower.
Kansas vs Washington Population and History
Population: Kansas has a population of 2,970,606 (2024), while Washington has 7,958,180 (2024). Washington's population is 2.7 times (168%) larger than Kansas'.
Population density: Kansas: 36.3 people per square mile vs Washington: 119.8. Washington's population density is 3.3 times (230%) higher than Kansas'.
Biggest city: Kansas's biggest city is Wichita with 400,991 people; Washington's is Seattle with 780,995. Seattle's population is 1.9 times (95%) larger than Wichita's.
Largest metro area: Kansas's largest metropolitan area is Kansas City, MO-KS metro area (2,253,579 people) vs Washington's Seattle-Tacoma-Bellevue, WA metro area (4,145,494). Seattle-Tacoma-Bellevue, WA metro area's population is 1.8 times (84%) larger than Kansas City, MO-KS metro area's.
History: Kansas: Admitted to the Union on January 29, 1861, as the 34th state. Washington: Admitted to the Union on November 11, 1889, as the 42nd state. In its current form, Kansas is the older of the two by 28 years.
Kansas vs Washington Economy
GDP: Kansas's GDP is $230.5 billion (2024) vs Washington's $856.0 billion. Washington's economic output is 3.7 times (271%) larger than Kansas'.
GDP per capita: Kansas: $77,601 per person vs Washington: $107,564. Washington's GDP per capita is 1.4 times (39%) higher than Kansas'.
Average income: Kansas: $65,856 vs Washington: $85,187 average income per person (per capita personal income). Washington's average income is 1.3 times (29%) higher than Kansas'.
Kansas vs Washington Counties
Number of counties: Kansas has 105 counties, while Washington has 39. Kansas' county count is 2.7 times (169%) higher than Washington's.
Biggest county by area: Kansas's largest county is Butler County at 1,430 square miles; Washington's is Okanogan County at 5,266 square miles. Okanogan County's land area is 3.7 times (268%) larger than Butler County's.
Smallest county by area: Kansas: Wyandotte County (152 sq mi) vs Washington: San Juan County (174 sq mi). San Juan County's land area is 1.1 times (15%) larger than Wyandotte County's.
Most populous county: Kansas: Johnson County (632,276 people) vs Washington: King County (2,340,211 people). King County's population is 3.7 times (270%) larger than Johnson County's.
Least populous county: Kansas: Greeley County (1,152 people) vs Washington: Garfield County (2,404 people). Garfield County's population is 2.1 times (109%) larger than Greeley County's.
Richest county: Kansas: Greeley County ($134,780 per capita income) vs Washington: King County ($128,684). Greeley County's income is 1.0 times (5%) richer than King County's.
Poorest county: Kansas: Wyandotte County ($42,878 per capita income) vs Washington: Ferry County ($50,456). Ferry County's income is 1.2 times (18%) richer than Wyandotte County's.
Kansas vs Washington Taxes
State income tax: Kansas has a top income tax rate of 5.58%, while Washington has a 9% tax on capital gains only.
Property tax: Kansas: 1.25% effective rate vs Washington: 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 Washington: 9.57%. Washington's combined rate is 0.86 percentage points higher.
Official Websites
Kansas official website · Washington official website
More Size Comparisons
All Kansas size comparisons · All Washington 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.