Umatilla County Post Offices

230 Old Hwy 11
Adams, Oregon 97810

345 E Main St
Athena, Oregon 97813

130 W Main
Echo, Oregon 97826

209 Concord St
Helix, Oregon 97835

375 W Orchard Ave
Hermiston, Oregon 97838

109 W Broadway Ave
Milton Freewater, Oregon 97862

104 SW Dorion Ave
Pendleton, Oregon 97801

103 NW Alder Pl
Pilot Rock, Oregon 97868

420 S Main St
Stanfield, Oregon 97875

105 E Main St
Ukiah, Oregon 97880

1900 6th St
Umatilla, Oregon 97882

204 E Main St
Weston, Oregon 97886

Umatilla County

There are 12 US Post Offices in Umatilla County serving a total of 75,869 residents equating to 6,322 residents per post office. It's estimated that approximately 121,095 packages are handled across the 12 county post offices annually. Umatilla County /\u02ccju\u02d0m\u0259\u02c8t\u026al\u0259/ is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 75,889. The county seat is Pendleton, but the largest city is Hermiston. The county is named for the Umatilla River. Umatilla County is part of the Pendleton\u2013Hermiston, OR Micropolitan Statistical Area. It is included in the eight-county definition of Eastern Oregon."