ZIP Codes of Union County, OR

Population & People
Population & People
Total Population
26,205
Household Income
Household Income
Median Income
$78,107
Housing
Housing
Total Housing Units
11,843
Business & Economy
Business & Economy
Total Businesses
747
Employment
Employment
Employment Rate
55.80%
Education
Education
Bachelor's Degree+
26.17%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:458 / 541
Timezone:Pacific (GMT -08:00)
Local Time:2:13:29 PM
Population:26,205 [See All]
FIPS:41061
CBSA:La Grande, OR
Land Area:1,669 sq mi
Water Area:1 sq mi
Coordinates:45.3683, -117.9583
Quick Link:
https://www.zip-codes.com/county/or-union.asp
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Oregon's #23 most populous county
26,205 residents across 7 ZIPs — #23 of 38 Oregon counties.

Standout ZIPs in this County


Most Populous
La Grande · 16,903 people
64.5% of county total
Highest Income
Summerville · $119,531 median
1.5× county average
Largest Land Area
La Grande · 610.4 sq mi
Spans the most ground
Fastest Growth
Cove · 10.1% (10-yr)
1,922 → 2,117 residents
Most Educated
Cove · 32.3% bachelor's+
494 of 1,528 adults 25+

Things worth knowing about Union County


26,205 residents live across 7 ZIPs covering 1,669 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 25,834 to 26,205 from 2014 to 2024 — a +1.4% change. 5 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 97876 (Summerville, $119,531 median) and poorest ZIP 97827 (Elgin, $60,766) are 9.8 miles apart — a 2.0× income gap across local geography.

Median home values vary 2.9× across this county — from $152,000 in 97867 (North Powder) to $435,600 in 97876 (Summerville).

Density varies across the county — from 5 people/sq mi in 97867 (North Powder) to 28 in 97850 (La Grande).

Educational attainment ranges from 14.0% bachelor's+ in 97827 (Elgin) to 37.0% in 97876 (Summerville) — the breadth of educational profiles across the area.

Within Oregon, this is the #23 most populous of 38 counties and ranks #15 for median household income .

Weighted by population, the typical household earns about $67,721 across the county — reflecting what a typical resident sees, not a simple ZIP average.

26.2% of adults age 25+ hold a bachelor's degree or higher (4,613 of 17,628 reporting).

7 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Union County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
1,669
square miles
Avg density
15.7
people per sq mi
Population
26,205
across 7 ZIPs
La Grande
610.4 sq mi
16,903 residents
Elgin
381.8 sq mi
2,384 residents
Union
233.9 sq mi
2,489 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

La Grande

All ZIP Codes in Union County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
97850La GrandeStandard16,903$63,421610.40.1%
97883UnionStandard2,489$65,172233.99.8%
97827ElginStandard2,384$60,766381.8-6.8%
97824CoveStandard2,117$80,263143.510.1%
97876SummervilleStandard995$119,53185.913.7%
97867North PowderStandard947$83,846198.26.6%
97841ImblerStandard370$73,75015.3-16.7%

Adjacent & Nearby Counties