Grant County Post Offices

101 S Clark St
Canyon City, Oregon 97820

145 E Franklin Ave
Dayville, Oregon 97825

151 N Canyon Blvd
John Day, Oregon 97845

41345 Hwy 19 Ste B
Kimberly, Oregon 97848

610 Hwy 395 N
Long Creek, Oregon 97856

177 North St
Monument, Oregon 97864

101 W Main St
Mount Vernon, Oregon 97865

150 SW Main St
Prairie City, Oregon 97869

112 Barnes Ave
Seneca, Oregon 97873

Grant County

There are 9 US Post Offices in Grant County serving a total of 7,337 residents equating to 815 residents per post office. It's estimated that approximately 11,711 packages are handled across the 9 county post offices annually. Grant County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 7,445. The county seat is Canyon City. It is named for President Ulysses S. Grant, who served as an army officer in the Oregon Territory, and at the time of the county's creation was a Union general in the American Civil War. Grant County is included in the 8 county definition of Eastern Oregon."