There are 13 zip codes in Malheur County, Oregon. The most populated is 97914, located in Ontario. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
9791419,802Ontario
979135,475Nyssa
979184,389Vale
97901676Adrian
97910627Jordan Valley
97906322Harper
9791152Juntura
9791741Riverside
9792028Westfall
9790227Arock
9790825Ironside
9790324Brogan
9790922Jamieson

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