Adams County, Washington

Adams County population, land area and income

Adams County had 21,039 residents in the Census Vintage 2024 estimate, on 1,925.0 square miles of land. It ranks 31st of 39 in Washington by population and 14th by land area. That works out to 10.9 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Washington has 69,632 residents, so Adams County has 30% of the typical county's population.

Its SAIPE 2023 median household income of $67,056 is above the national county median among 3,143 counties with an estimate.

How Adams County's population changed since 2020

Adams County gained 430 residents between the July 2020 and July 2024 estimates, a rise of 2.1%. That ranks 30th of 39 in Washington for growth. The median Washington county changed by +3.2%, and the state as a whole by +3.0%.

Since the April 2020 estimates base, Adams County recorded 1,425 births and 685 deaths, a natural change of +740. Net international migration added +398 and net domestic migration, people moving to or from other US counties, came to -696. The largest single component was natural change, which added 740 people.

Where Adams County is

The Census internal point of Adams County is at 47.011200, -118.512900. It sits in UTM zone 11N. The map shades Washington's 39 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Adams County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Adams County

2 incorporated places of 1,000+ people have residents in Adams County, 10,710 people together, or 51% of the county. Each figure counts only the part of the town inside Adams County; towns marked "part" extend into another county. The largest is Othello with 9,001.

Counties bordering Adams County

The Census 2024 county adjacency file lists 4 neighbors for Adams County. The most populous is Grant County, WA, with 104,717 residents. Distances run between Census internal points in a straight line.

• Grant County

  104,717 people

  47 mi WNW

• Franklin County

  101,238 people

  38 mi SSW

• Whitman County

  48,399 people

  47 mi E

• Lincoln County

  11,862 people

  40 mi N

Distance to Olympia and the nearest big city

Olympia is 206.6 miles W of Adams County's internal point in a straight line. The nearest place of 100,000 or more is Spokane, WA (population 230,609), 67.9 miles away. The nearest place of 10,000 or more is Moses Lake, WA (population 26,969), 36.8 miles away.

Adams County FIPS code

The FIPS code of Adams County is 53001: state code 53 for Washington plus county code 001. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $67,056.