Grant County, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 13th-largest in Washington
The population of Grant County, Washington is 100,428 as of the 2023 American Community Survey, making it the 13th-largest county in Washington. The median household income is $71,115, the median home value is $275,700, and the median age is 33.5.
The population of Grant County has grown 16.9% since 2010 (89,554 → 104,717), a +1.12% annualized rate.
100,428
Population
+1.12%
Annual growth
37
People / sq mi
$71,115
Median Income
$275,700
Median Home Value
Grant County covers 2,680 sq mi of land at 37.5 people per square mile.
About Grant County, WA
Grant County is a county in Washington with a population of 100,428. It ranks #13 among counties in Washington by population. The median age is 33.5, younger than the national median. The population is 51.1% male and 48.9% female.
The median household income in Grant County is $71,115, near the US median of $74,580. 11.0% of residents live below the federal poverty level. Home values sit at a median of $275,700, with monthly rent averaging $1,059. The homeownership rate of 65.6% is close to the national rate of 64.8%.
Educational attainment in Grant County reflects 18.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.2% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 20.1 minutes each way.
Grant County Population History (2010-2024)
The county of Grant County had a population of 89,554 in 2010 and 104,717 in 2024, a 16.9% growth over 14 years. The peak was 104,717 in 2024. Average annual growth rate: 1.12%.
104,717
Population (2024)
89,554
Population (2010)
104,717
Peak (2024)
1.12%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 89,554 |
| 2011 | 90,588 |
| 2012 | 91,292 |
| 2013 | 91,698 |
| 2014 | 92,898 |
| 2015 | 93,517 |
| 2016 | 94,144 |
| 2017 | 95,262 |
| 2018 | 96,497 |
| 2019 | 97,959 |
| 2020 | 99,445 |
| 2021 | 100,437 |
| 2022 | 101,308 |
| 2023 | 103,088 |
| 2024 | 104,717 |
Race & Ethnicity
| White | 59.0% |
| Black or African American | 1.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.3% |
| Two or More Races | 0.0% |
Age & Sex
33.5
Median Age
48.9%
Female
51.1%
Male
14.3%
Age 65+
Age Distribution
Children (under 15): 23.6% · Seniors (65+): 14.3%
Income & Poverty
| Median household income | $71,115$-23,837 vs state |
| Mean household income | $89,681 |
| Per-capita income | $32,241 |
| Poverty rate | 11.0%+4.6% vs state |
| Unemployment rate | 4.0% |
| Employment-to-population | 58.6% |
Top Industries by Employment
The largest employment sector in Grant County is professional & business services, accounting for 22.0% of workers.
How residents commute
1.5%
Drive alone
1.8%
Carpool
73.6%
Public transit
9.2%
Work from home
20.1 min
Avg commute
Housing
$275,700$-244,100 vs state
Median home value
$1,059
Median rent
65.6%
Homeownership rate
39,496
Total housing units
87.4%
Occupied
12.6%
Vacant
34.4%
Renter-occupied
Social & access
86.7%
With health insurance
94.0%
With broadband internet
24.0%
Foreign-born
7.0%
Veterans (18+)
13.9%
With a disability
64.4%
Speak language other than English at home
Education
81.4%
High School+
18.2%
Bachelor's+
Largest cities in Washington
Other counties in Washington
Part of Washington
Metro areas in Washington
County rankings
Frequently Asked Questions
Grant County, Washington has a population of 100,428 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 13th-largest county in Washington. Population density is 37 people per square mile.
The population of Grant County has grown 16.9% since 2010 (89,554 → 104,717), a +1.12% annualized rate.
The median household income in Grant County, Washington is $71,115, with mean (average) household income of $89,681 and per-capita income of $32,241. 11.0% of residents live below the federal poverty level.
In Grant County, the largest racial and ethnic groups are White (59.0%), Hispanic or Latino (3.3%), Black or African American (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Grant County, Washington is 33.5 years. Residents are 48.9% female and 51.1% male.
The median home value in Grant County is $275,700 and median monthly rent is $1,059. 65.6% of occupied housing units are owner-occupied. The county has 39,496 total housing units, 12.6% of which are vacant.
The largest employment sector in Grant County, Washington is professional, scientific, and management services, employing 22.0% of workers. The unemployment rate is 4.0%.
Seattle is among the largest cities associated with Grant County, Washington, with a population of 741,440.
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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.