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zipcodes.pro — STATE/OR/COUNTY/GILLIAM

Gilliam County, OR ZIP codes

Gilliam County, OR has 3 ZIP codes, in 3 towns: 97823, 97812 and 97861.

The county seat is Condon.

ZIP codes
3
Towns
3
County seat
Condon
County FIPS
41021
State
Oregon
Population
1,971
Median household income
$66,917
Land area
1,205 sq mi

Gilliam County ZIP codes by town

Condon (county seat)
97823

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Gilliam County ZIP codes

978129782397861

The ZIP codes of Gilliam County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Gilliam County in numbers

About 1,971 people live in Gilliam County, in 875 households, the 34th most populous of Oregon's 36 counties. The median household income is $66,917 a year, 19% below the Oregon median of $83,011 (US: $80,734). The median owner-occupied home is valued at $189,300 (60% below the Oregon median), and median gross rent is $1,125 a month. The median age is 50.1; 21.0% of adults 25 and over hold a bachelor's degree or higher (36.8% across Oregon); the average commute takes 19 minutes.

Population1,971Gilliam1,971
Households875Gilliam875
Median age50.1Gilliam50.1Oregon40.4US 38.9
Median household income$66,917Gilliam$66,917Oregon$83,011US $80,734
Median home value$189,300Gilliam$189,300Oregon$477,600US $332,700
Median gross rent$1,125Gilliam$1,125Oregon$1,525US $1,413
Bachelor's degree or higher21.0%Gilliam21.0%Oregon36.8%US 35.7%
Mean commute19.0 minGilliam19.0 minOregon23.0 minUS 26.4 min
Population density2 / sq miGilliam2 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Gilliam County

Largest towns in Gilliam County
TownZIP codesPopulation
Arlington 1 690
Condon 1 623

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Gilliam County.

Not sure you are in Gilliam County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Gilliam County, with figures

ZIP codes in Gilliam County
ZIP City Type Population Median income Median home
97812 Arlington , OR Standard 932 $77,258 $293,500
97823 Condon , OR Standard 1,014 $57,727 $150,500
97861 Mikkalo , OR No street area — — —

Cite this page

zipcodes.pro. “Gilliam County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/or/county/gilliam

Underlying data is public domain or openly licensed — sources, vintages and licences.