Grant County, Washington
County seat: Ephrata · Population 105,727 (2025) · 2,680 sq mi
Grant County is the 13th most populous of Washington's 39 counties, with 105,727 people (2025 estimate). Its county seat is Ephrata. The map shows its 15 cities and towns and the 8 neighboring counties.
Grant County facts
- County seat
- Ephrata
- Population (2025 estimate)
- 105,727 +6.7% since 2020
- Land area
- 2,680 sq mi 4th largest of 39
- Water area
- 112 sq mi
- Population density
- 40 per sq mi
- Established
- 1909
- Same name
- One of 14 Grant Counties in the US
- Named after
- Ulysses S. Grant president of the United States from 1869 to 1877
- Largest city
- Moses Lake 27,469
- Median household income
- $73,267
- Cities and towns
- 15 plus 11 CDPs
- ZIP codes
- 19
- Time zone
- Pacific
- FIPS code
- 53025
Cities and towns in Grant County
Grant County has 15 incorporated cities, towns and villages. Populations count the people living inside Grant County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Moses Lake | City | 27,469 | |
| Ephrata (county seat) | City | 8,834 | |
| Quincy | City | 8,510 | |
| Mattawa | City | 3,874 | |
| Warden | City | 2,830 | |
| Royal City | City | 1,896 | |
| Soap Lake | City | 1,817 | |
| George | City | 1,024 | |
| Electric City | City | 954 | |
| Grand Coulee | City | 947 | |
| Coulee City | Town | 550 | |
| Wilson Creek | Town | 204 | |
| Hartline | Town | 175 | |
| Krupp | Town | 45 | |
| Coulee Dam | Town | 0 | Douglas and Okanogan counties |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Cascade Valley | 4,609 | |
| Moses Lake North | 4,517 | |
| Desert Aire | 2,788 | |
| Lakeview | 1,584 | |
| Marine View | 471 | |
| Schwana | 387 | |
| Beverly | 356 | |
| Banks Lake South | 348 | |
| Crescent Bar | 271 | |
| Wheeler | 230 | |
| Sunland Estates | 91 |
ZIP codes in Grant County
19 ZIP codes reach into Grant County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 98823 also Douglas County
- 98824
- 98832 also Lincoln and Adams counties
- 98837
- 98848 also Douglas County
- 98851
- 98853
- 98857 also Adams County
- 98860
- 99103 also Lincoln County
- 99115 also Douglas County
- 99116 also Okanogan and Douglas counties
- 99123
- 99133 also Douglas and Lincoln counties
- 99135
- 99321
- 99344 also Adams and Franklin counties
- 99349
- 99357
Population of Grant County, 2020–2025
Grant County grew by 6,592 people (+6.7%) between April 2020 and July 2025: 2,691 more births than deaths and a net gain of 3,866 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 99,446 |
| 2021 | 100,439 |
| 2022 | 101,277 |
| 2023 | 103,035 |
| 2024 | 104,834 |
| 2025 | 105,727 |
Neighboring counties
- Douglas County north · 46,473 people
- Adams County east · 21,488 people
- Lincoln County northeast · 11,982 people
- Kittitas County west · 48,803 people
- Benton County south · 221,722 people
- Yakima County southwest · 259,185 people
- Franklin County southeast · 102,612 people
- Okanogan County north · 45,230 people
Printable Grant County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (175 KB)
- PNG (2400 px) (125 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
Back to the Washington county map with all 39 counties. Found an error? Tell us.