Whitman County, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 23rd-largest in Washington
The population of Whitman County, Washington is 47,042 as of the 2023 American Community Survey, making it the 23rd-largest county in Washington. The median household income is $52,893, the median home value is $323,300, and the median age is 26.1.
The population of Whitman County has grown 8.0% since 2010 (44,795 → 48,399), a +0.55% annualized rate.
47,042
Population
+0.55%
Annual growth
22
People / sq mi
$52,893
Median Income
$323,300
Median Home Value
Whitman County covers 2,159 sq mi of land at 21.8 people per square mile.
About Whitman County, WA
Age is the most distinctive thing about Whitman County: a median age of 26.1, younger than the national median. Whitman County is a county in Washington with a population of 47,042. It ranks #23 among counties in Washington by population.
The typical household earns $52,893, below the US median of $78,538. About 9.3% of residents live below the federal poverty level, below the national 12.4%. The median home value is $323,300, with typical rent around $1,002.
Degree attainment is near the top of the range for US counties: 50.2% of adults 25+ hold a bachelor’s, above the 35.0% national rate. About 9.5% of the workforce is home-based, below the national 14.0%, and the average commute runs about 16 minutes each way.
Whitman County Population History (2010-2024)
The county of Whitman County had a population of 44,795 in 2010 and 48,399 in 2024, a 8.0% growth over 14 years. The peak was 50,136 in 2019. Average annual growth rate: 0.64%.
48,399
Population (2024)
44,795
Population (2010)
50,136
Peak (2019)
0.64%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 44,795 |
| 2011 | 45,067 |
| 2012 | 46,660 |
| 2013 | 46,831 |
| 2014 | 46,965 |
| 2015 | 48,224 |
| 2016 | 48,912 |
| 2017 | 49,514 |
| 2018 | 49,821 |
| 2019 | 50,136 |
| 2020 | 47,821 |
| 2021 | 43,242 |
| 2022 | 47,653 |
| 2023 | 47,900 |
| 2024 | 48,399 |
Race & Ethnicity
| White | 76.7% |
| Black or African American | 1.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.6% |
| Two or More Races | 0.0% |
Age & Sex
26.1
Median Age
49.3%
Female
50.7%
Male
11.5%
Age 65+
Age Distribution
Children (under 15): 12.8% · Seniors (65+): 11.5%
Income & Poverty
| Median household income | $52,893$-42,059 vs state |
| Mean household income | $78,956 |
| Per-capita income | $31,884 |
| Poverty rate | 9.3%+2.9% vs state |
| Unemployment rate | 4.0% |
| Employment-to-population | 58.1% |
Top Industries by Employment
The largest employment sector in Whitman County is professional & business services, accounting for 39.5% of workers.
How residents commute
3.4%
Drive alone
11.7%
Carpool
61.8%
Public transit
9.5%
Work from home
16.4 min
Avg commute
Housing
$323,300$-196,500 vs state
Median home value
$1,002
Median rent
46.6%
Homeownership rate
21,232
Total housing units
84.6%
Occupied
15.4%
Vacant
53.4%
Renter-occupied
Social & access
94.6%
With health insurance
96.4%
With broadband internet
43.5%
Foreign-born
4.7%
Veterans (18+)
13.1%
With a disability
88.7%
Speak language other than English at home
Education
96.1%
High School+
50.2%
Bachelor's+
Largest cities in Washington
Other counties in Washington
Part of Washington
Metro areas in Washington
County rankings
Frequently Asked Questions
Whitman County, Washington has a population of 47,042 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 23rd-largest county in Washington. Population density is 22 people per square mile.
The population of Whitman County has grown 8.0% since 2010 (44,795 → 48,399), a +0.55% annualized rate.
The median household income in Whitman County, Washington is $52,893, with mean (average) household income of $78,956 and per-capita income of $31,884. 9.3% of residents live below the federal poverty level.
In Whitman County, the largest racial and ethnic groups are White (76.7%), Hispanic or Latino (2.6%), Black or African American (1.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Whitman County, Washington is 26.1 years. Residents are 49.3% female and 50.7% male.
The median home value in Whitman County is $323,300 and median monthly rent is $1,002. 46.6% of occupied housing units are owner-occupied. The county has 21,232 total housing units, 15.4% of which are vacant.
The largest employment sector in Whitman County, Washington is professional, scientific, and management services, employing 39.5% of workers. The unemployment rate is 4.0%.
Seattle is among the largest cities associated with Whitman County, Washington, with a population of 741,440.
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Full rankings of Washington counties
Statewide data for Washington
Population, race, income, age, and trends across Washington
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.