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 skews on age — the median resident is 33.5, younger than the national median. Grant County is a county in Washington with a population of 100,428. It ranks #13 among counties in Washington by population.
Household earnings are middling, with a median of $71,115 — below the US median of $78,538. The poverty rate is 11.0%, below the national 12.4%. A typical home is worth $275,700, with typical rent around $1,059.
Degree attainment is mid-range for US counties: 18.2% of adults hold a four-year degree, below the national 35.0%. Around 9.2% of workers work from home, below the national 14.0%, and the average commute runs about 20 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.
Grant County, WA Climate
Grant County, WA has an average annual temperature of 10.7°C (51°F) and receives about 182 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10.7°C
Avg Temp
182
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 21 mm |
| February | 2° / 35° | 15 mm |
| March | 7° / 44° | 16 mm |
| April | 11° / 51° | 13 mm |
| May | 16° / 60° | 14 mm |
| June | 20° / 68° | 11 mm |
| July | 23° / 74° | 4 mm |
| August | 23° / 73° | 6 mm |
| September | 17° / 63° | 8 mm |
| October | 11° / 51° | 11 mm |
| November | 4° / 38° | 28 mm |
| December | -1° / 29° | 35 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 Grant County, WA
The most comfortable months to visit Grant County, WA are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -5°C low). December is usually the wettest month.
Where to stay near Grant County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.