U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
County directory

Umatilla County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Umatilla County.

County State ZIP Code City Area Codes
Umatilla County OR 97801 Pendleton 458, 541
Umatilla County OR 97810 Adams 458, 541
Umatilla County OR 97813 Athena 458, 541
Umatilla County OR 97826 Echo 458, 541
Umatilla County OR 97835 Helix 458, 509, 541
Umatilla County OR 97838 Hermiston 458, 509, 541
Umatilla County OR 97859 Meacham 458, 541
Umatilla County OR 97862 Milton Freewater 458, 509, 541
Umatilla County OR 97868 Pilot Rock 458, 541
Umatilla County OR 97875 Stanfield 458, 541
Page 1 of 2

Geographic Map of Umatilla County

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.