Grant County Sheriff’s Office
35 C Street NW
Ephrata, WA 98823
Phone: 509.754.2011
Grant County was named after U.S. President Ulysses S. Grant. As of 2017, the estimated population is 95,158. The largest city is Moses Lake.
Grant County was formed out of Douglas County on February 24, 1909.
According to the U.S. Census Bureau, the county has a total area of 2,791 square miles, of which, 2,681 square miles of it is land and 110 square miles of it (3.95%) is water. The population density is 3 per square mile.
Principal Communites:
- Coulee City
- Coulee Dam (partial)
- Desert Aire
- Electric City
- Ephrata (County Seat)
- George
- Grand Coulee
- Mattawa
- Moses Lake
- Quincy
- Royal City
- Soap Lake
- Warden
