Washington county map

Washington population and land area

Washington had 7,958,180 residents in the Census Vintage 2024 estimates, the sum of its counties. That ranks 13th of the 50 states and DC. Its 66,455 square miles of land rank 20th. Washington averages 119.8 people per square mile of land, close to the national figure of 96.3. By density it ranks 24th.

Washington counties by population, density and income

Each shape is shaded by quintile, darker for higher values. Switch the measure above the map. Select a shape to open that county's page. The pin marks the capital, Olympia.

Largest county in Washington by land area

Okanogan County ranks first at 5,266 square miles and San Juan County last at 174 square miles. The top value is 30 times the bottom one.

Most populous county in Washington

King County ranks first at 2,340,211 residents and Garfield County last at 2,404 residents. The gap is more than a hundredfold.

Least populous county in Washington

The smallest populations, fewest first. Estimates for small counties carry more uncertainty than those for large ones.

Most densely populated county in Washington

King County ranks first at 1,106.1 people per square mile and Garfield County last at 3.4 people per square mile. The gap is more than a hundredfold.

Highest median household income in Washington

King County ranks first at $120,672 and Ferry County last at $57,090. The top value is 2.1 times the bottom one.

Towns and cities in Washington

The Census Vintage 2024 subcounty estimates list 206 incorporated places in Washington with 1,000 or more residents, holding 5,200,951 people together, or 65% of the state total. 125 of them have 5,000 or more. The northernmost is Sumas at 48.996° N and the southernmost is Washougal at 45.583° N. Among places of 5,000+, Ridgefield grew fastest from July 2020 to July 2024, by 41.3%.

Olympia, the capital

74.1% of Washington's place population, 3,852,104 of 5,200,951 people, lives in places within 100 miles of Olympia. That ranks 24th of 51 for how central the capital is. The most remote town of 1,000 to 9,999 people is Oroville, 112 miles in a straight line from the nearest place of 10,000+ (Wenatchee).

See all states in the capital radius ranking and the most remote towns ranking. Sunrise and sunset times for Olympia, month by month, are on the Olympia daylight page.

States bordering Washington

Washington borders 2 states or districts. The nearest neighboring capital is Salem, 145 miles S of Olympia in a straight line.

UTM zones in Washington

The internal points of Washington's counties fall in UTM zones 10, 11. Zones are 6 degrees of longitude wide, numbered from 180° W: zone = floor((longitude + 180) / 6) + 1. Because Washington spans 2 zones, no single UTM zone covers the whole state.

All 39 counties in Washington

Sort by any column. The small orange number marks the top 3 in the state by population.

Download all 39 counties as CSV