Clark County, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 5th-largest in Washington
The population of Clark County, Washington is 510,516 as of the 2023 American Community Survey, making it the 5th-largest county in Washington. The median household income is $94,948, the median home value is $487,900, and the median age is 38.9.
The population of Clark County has grown 23.6% since 2010 (426,733 → 527,269), a +1.52% annualized rate.
510,516
Population
+1.52%
Annual growth
812
People / sq mi
$94,948
Median Income
$487,900
Median Home Value
Clark County covers 629 sq mi of land at 812.3 people per square mile.
About Clark County, WA
In Clark County, home values do the distinguishing — a median of $487,900. With 510,516 residents, Clark County is a county in Washington. It is the #5-largest of all counties in Washington nationally.
Households here are among the highest-earning of all US counties: median income is $94,948, above the US median of $78,538. Only 5.8% of residents live in poverty, below the national 12.4%. Home prices are steep, with the typical property valued at $487,900, with typical rent around $1,668.
Educational attainment is on the higher side for US counties — 33.0% of adults hold a four-year degree, below the national 35.0%. Remote work is widespread — 17.3% of workers stay home, above the national 14.0%, and the average commute runs about 25 minutes each way.
High housing values reframe the income picture in Clark County — even solid earnings stretch less against home prices and rents at this level.
Clark County Population History (2010-2024)
The county of Clark County had a population of 426,733 in 2010 and 527,269 in 2024, a 23.6% growth over 14 years. The peak was 527,269 in 2024. Average annual growth rate: 1.52%.
527,269
Population (2024)
426,733
Population (2010)
527,269
Peak (2024)
1.52%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 426,733 |
| 2011 | 432,388 |
| 2012 | 436,532 |
| 2013 | 441,591 |
| 2014 | 448,505 |
| 2015 | 457,320 |
| 2016 | 465,911 |
| 2017 | 475,238 |
| 2018 | 482,467 |
| 2019 | 489,271 |
| 2020 | 505,363 |
| 2021 | 512,662 |
| 2022 | 517,036 |
| 2023 | 522,467 |
| 2024 | 527,269 |
Race & Ethnicity
| White | 77.3% |
| Black or African American | 2.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.5% |
| Two or More Races | 0.1% |
Age & Sex
38.9
Median Age
50.3%
Female
49.7%
Male
16.2%
Age 65+
Age Distribution
Children (under 15): 18.9% · Seniors (65+): 16.2%
Income & Poverty
| Median household income | $94,948$-4 vs state |
| Mean household income | $120,560 |
| Per-capita income | $46,391 |
| Poverty rate | 5.8%-0.6% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 60.7% |
Top Industries by Employment
The largest employment sector in Clark County is professional & business services, accounting for 20.9% of workers.
How residents commute
1.2%
Drive alone
1.6%
Carpool
70.4%
Public transit
17.3%
Work from home
25.2 min
Avg commute
Housing
$487,900$-31,900 vs state
Median home value
$1,668
Median rent
66.2%
Homeownership rate
201,114
Total housing units
96.2%
Occupied
3.8%
Vacant
33.8%
Renter-occupied
Social & access
93.2%
With health insurance
97.2%
With broadband internet
53.0%
Foreign-born
8.3%
Veterans (18+)
13.0%
With a disability
83.6%
Speak language other than English at home
Education
92.8%
High School+
33.0%
Bachelor's+
Largest cities in Washington
Other counties in Washington
Part of Washington
Metro areas in Washington
County rankings
Common questions about Clark County, WA
Frequently Asked Questions
Clark County, Washington has a population of 510,516 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 5th-largest county in Washington. Population density is 812 people per square mile.
The population of Clark County has grown 23.6% since 2010 (426,733 → 527,269), a +1.52% annualized rate.
The median household income in Clark County, Washington is $94,948, with mean (average) household income of $120,560 and per-capita income of $46,391. 5.8% of residents live below the federal poverty level.
In Clark County, the largest racial and ethnic groups are White (77.3%), Hispanic or Latino (2.5%), Black or African American (2.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Clark County, Washington is 38.9 years. Residents are 50.3% female and 49.7% male.
The median home value in Clark County is $487,900 and median monthly rent is $1,668. 66.2% of occupied housing units are owner-occupied. The county has 201,114 total housing units, 3.8% of which are vacant.
The largest employment sector in Clark County, Washington is professional, scientific, and management services, employing 20.9% of workers. The unemployment rate is 3.3%.
Seattle is among the largest cities associated with Clark County, Washington, with a population of 741,440.
Clark County, WA Climate
Clark County, WA has an average annual temperature of 10.4°C (51°F) and receives about 1907 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
10.4°C
Avg Temp
1907
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 3° / 38° | 282 mm |
| February | 5° / 42° | 222 mm |
| March | 7° / 45° | 197 mm |
| April | 9° / 49° | 140 mm |
| May | 12° / 54° | 102 mm |
| June | 15° / 59° | 74 mm |
| July | 18° / 64° | 31 mm |
| August | 18° / 64° | 45 mm |
| September | 16° / 60° | 83 mm |
| October | 11° / 52° | 152 mm |
| November | 7° / 44° | 280 mm |
| December | 4° / 38° | 299 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Clark County, WA
The most comfortable months to visit Clark County, WA are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 26°C high). The coldest is January (near 0°C low). December is usually the wettest month.
Where to stay near Clark County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.