The map above shows Missouri and Washington side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Missouri vs Washington Geography
Land area: Missouri has a land area of 68,746 square miles (178,052 km²), while Washington has 66,455 square miles (172,119 km²). Missouri and Washington have about the same land area.
Total area: Missouri: 69,707 square miles (180,540 km²) vs Washington: 71,301 square miles (184,668 km²), including inland and coastal water. Missouri and Washington have about the same total area.
Length: Missouri is 328 miles (529 km) long from north to south; Washington is 238 miles (383 km). Missouri's north-south length is 1.4 times (38%) longer than Washington's.
Width: Missouri spans 437 miles (703 km) east to west; Washington spans 399 miles (641 km). Missouri's east-west width is 1.1 times (10%) wider than Washington's.
Highest point: Missouri's highest point is Taum Sauk Mountain at 1,771 feet (540 m); Washington's is Mount Rainier at 14,409 feet (4,392 m). Mount Rainier is 12,638 feet higher than Taum Sauk Mountain.
Lowest point: Missouri's lowest point is St. Francis River at 230 feet; Washington's is Pacific Ocean at 0 feet. Washington's lowest point is 230 feet lower.
Missouri vs Washington Population and History
Population: Missouri has a population of 6,245,466 (2024), while Washington has 7,958,180 (2024). Washington's population is 1.3 times (27%) larger than Missouri's.
Population density: Missouri: 90.8 people per square mile vs Washington: 119.8. Washington's population density is 1.3 times (32%) higher than Missouri's.
Biggest city: Missouri's biggest city is Kansas City with 516,032 people; Washington's is Seattle with 780,995. Seattle's population is 1.5 times (51%) 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 Washington's Seattle-Tacoma-Bellevue, WA metro area (4,145,494). Seattle-Tacoma-Bellevue, WA metro area's population is 1.5 times (47%) larger than St. Louis, MO-IL metro area's.
History: Missouri: Admitted to the Union on August 10, 1821, as the 24th state. Washington: Admitted to the Union on November 11, 1889, as the 42nd state. In its current form, Missouri is the older of the two by 68 years.
Missouri vs Washington Economy
GDP: Missouri's GDP is $448.7 billion (2024) vs Washington's $856.0 billion. Washington's economic output is 1.9 times (91%) larger than Missouri's.
GDP per capita: Missouri: $71,846 per person vs Washington: $107,564. Washington's GDP per capita is 1.5 times (50%) higher than Missouri's.
Average income: Missouri: $64,920 vs Washington: $85,187 average income per person (per capita personal income). Washington's average income is 1.3 times (31%) higher than Missouri's.
Missouri vs Washington Counties
Number of counties: Missouri has 115 counties, while Washington has 39. Missouri's county count is 2.9 times (195%) higher than Washington's.
Biggest county by area: Missouri's largest county is Texas County at 1,177 square miles; Washington's is Okanogan County at 5,266 square miles. Okanogan County's land area is 4.5 times (347%) larger than Texas County's.
Smallest county by area: Missouri: St. Louis city (62 sq mi) vs Washington: San Juan County (174 sq mi). San Juan County's land area is 2.8 times (182%) larger than St. Louis city's.
Most populous county: Missouri: St. Louis County (992,929 people) vs Washington: King County (2,340,211 people). King County's population is 2.4 times (136%) larger than St. Louis County's.
Least populous county: Missouri: Worth County (1,872 people) vs Washington: Garfield County (2,404 people). Garfield County's population is 1.3 times (28%) larger than Worth County's.
Richest county: Missouri: St. Louis County ($104,775 per capita income) vs Washington: King County ($128,684). King County's income is 1.2 times (23%) richer than St. Louis County's.
Poorest county: Missouri: Douglas County ($40,515 per capita income) vs Washington: Ferry County ($50,456). Ferry County's income is 1.2 times (25%) richer than Douglas County's.
Missouri vs Washington Taxes
State income tax: Missouri has a top income tax rate of 4.7%, while Washington has a 9% tax on capital gains only.
Property tax: Missouri: 0.79% effective rate vs Washington: 0.79% of home value per year. The two are essentially equal.
Sales tax: Missouri: 8.44% combined state and average local rate vs Washington: 9.57%. Washington's combined rate is 1.13 percentage points higher.
Official Websites
Missouri official website · Washington official website
More Size Comparisons
All Missouri 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.