There are 13 zip codes in Umatilla County, Oregon. The most populated is 97838, located in Hermiston. * 2024 populations estimated based on the latest ACS 5-year data.

CSV JSON
Zip Code
Population
City
9783827,713Hermiston
9780121,748Pendleton
9786212,460Milton Freewater
978828,081Umatilla
978752,608Stanfield
978681,594Pilot Rock
978131,468Athena
978261,185Echo
978101,047Adams
97886948Weston
97835488Helix
97880348Ukiah
97859235Meacham

Zip Codes in Umatilla County, Oregon by Population (2024)