Gilliam County, Oregon

Gilliam County: County in Oregon, United States


Gilliam County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 1,871 and a population density of 1 people per km². After 10 years in 2020 county had an estimated population of 1,975 inhabitants. Its county seat is Condon. The county was created 138 years ago in 1884.

Quick Facts about Gilliam County

Population : 1,975 (2020)
Country : United States of America
State : Oregon (United States)
Area : 3167 km2
Official name : Gilliam County
Water as percent of area : 1.5%
Land as percent of area : 98.5%
Named for : Cornelius Gilliam
Altitude : 2,503 feet / 763 meters
Capital : Condon
Establishment : January 01, 1885
Time Zone : America/Los_Angeles
Local time : 05:35:29 (28th January 2023)
Density : 1 Pop. per km² as of 2020
Population growth : 5.27% (2010-2020)
Gilliam County locator map
Location of Gilliam County on Oregon map.
CondonGilliamcourthouse image
CondonGilliamcourthouse image


Gilliam County is located at 45°22'41"N 120°12'39"W (45.3780600, -120.2108700). It has 5 neighbors: Morrow County, Sherman County, Wheeler County, Wasco County and Klickitat County.

Gilliam County map

The largest city of Gilliam County is Condon with a population of 714. Other cities include, Arlington population 626 and Lonerock population 22. See all Gilliam County cities & populated places.

Gilliam County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Gilliam County.

City Name Population Title
Condon 714 City in Oregon, USA
Arlington 626 City in Oregon, USA
Lonerock 22 City in Oregon, USA

Gilliam County has 5 neighbours.

  • Condon


The population of Gilliam County increased by 5.27% in 10 years.

Year Population % Change Method
2010 1,871 - census
2011 1,951 4.1% estimation process
2012 1,952 0.05% estimation process
2013 1,943 -0.46% estimation process
2014 1,930 -0.67% estimation process
2015 1,868 -3.32% estimation process
2016 1,857 -0.59% estimation process
2017 1,862 0.27% estimation process
2018 1,893 1.64% estimation process
2019 1,912 0.99% estimation process
2020 1,975 3.19% estimation process

Comitatul Gilliam, Comte de Gilliam, Comté de Gilliam, Condado de Gilliam, Condado han Gilliam, Contea di Gilliam, Gil'jam, Giliam srjan, Gilijam, Gilliam, Gilliam Comitatus, Gilliam Kun, Gilliam Kūn, Gilliam konderria, Gilliam megye, Gilliami maakond, Hrabstwo Gilliam, Okrug Gilijam, Quan Gilliam, Quận Gilliam, giriamu jun, ji lie mu xian, jiliyama ka'unti, mqatʿt ghylyam, shhrstan gylyam awrgn, Гилиям, Округ Гилијам, Ґільям, Գիլիամ շրջան, شهرستان گیلیام، اورگن, مقاطعة غيليام, گلیام کاؤنٹی، اوریگون, জিলিয়াম কাউন্টি, ギリアム郡, 吉列姆縣

People born in Gilliam County (2)

People born in Gilliam County, including jazz trumpeter Doc Severinsen, politician Earl Snell, .


Oregon Other Counties (more counties)

County Name Population Title
Multnomah County 815,637 County in Oregon, United States
Portland 656,751 City in Oregon, USA
Washington County 603,514 County in Oregon, United States
Clackamas County 421,596 County in Oregon, United States
Lane County 382,986 County in Oregon, United States
Marion County 349,204 County in Oregon, United States
Jackson County 221,844 County in Oregon, United States
Deschutes County 201,769 County in Oregon, United States
Salem 175,891 City and capital of Oregon, USA
Eugene 173,236 City in Lane County, Oregon, United States
Linn County 131,054 County in Oregon, United States
Terrebonne 117,664 Census-designated place in Deschutes County, Oregon
Douglas County 111,364 County in Oregon, United States
Hillsboro 110,985 City in Oregon, USA
Gresham 110,031 City in Oregon, USA
Yamhill County 107,664 County in Oregon, United States