Grant County Post Offices

20476 SW B St
Beverly, Washington 99321

101 N 4th St
Coulee City, Washington 99115

5 W Coulee Blvd
Electric City, Washington 99123

119 1st Ave NW
Ephrata, Washington 98823

407 Midway Ave
Grand Coulee, Washington 99133

867 Willard St
Hartline, Washington 99135

174 N Urquhart Ave
Marlin, Washington 98832

223 W 3rd Ave
Moses Lake, Washington 98837

20 C St SW
Quincy, Washington 98848

132 Evergreen Ave NW
Royal City, Washington 99357

511 S Division St
Soap Lake, Washington 98851

9800 Road 23 NE
Stratford, Washington 98853

201 E 1st St
Warden, Washington 98857

223 Railroad St
Wilson Creek, Washington 98860

Grant County

There are 14 US Post Offices in Grant County serving a total of 79,796 residents equating to 5,700 residents per post office. It's estimated that approximately 127,363 packages are handled across the 14 county post offices annually. Grant County is a county located in the U.S. state of Washington. As of the 2010 census, the population was 89,120. The county seat is Ephrata, and the largest city is Moses Lake. The county was formed out of Douglas County on February 24, 1909 and is named for U.S. President Ulysses S. Grant. Grant County comprises the Moses Lake, WA Micropolitan Statistical Area."