There are 7 zip codes in Union County, Oregon. The most populated is 97850, located in La Grande. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
97850La Grande16,646
97827Elgin2,599
97883Union2,575
97824Cove1,965
97876Summerville1,085
97867North Powder1,001
97841Imbler491

Union County, Oregon Zip Codes by Population (2024)