Umatilla County, Oregon

Umatilla County: County in Oregon, United States


Umatilla County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 75,889 and a population density of 9 people per km². After 10 years in 2020 county had an estimated population of 77,752 inhabitants. Its county seat is Pendleton. The county was created 162 years ago in 1861.

Umatilla County locator map
Location of Umatilla County on Oregon map.

Quick Facts about Umatilla County

Population : 77,752 (2020)
Country : United States of America
State : Oregon (United States)
Area : 8369 km2
Water as percent of area : 0.5%
Land as percent of area : 99.5%
Named for : Umatilla River
Altitude : 3,871 feet / 1180 meters
Capital : Pendleton
Establishment : January 01, 1862
Time Zone : America/Los_Angeles
Local time : 09:26:01 (15th June 2024)
Density : 9 Pop. per km² as of 2020
Population growth : 2.4% (2010-2020)
UmatillaCountyCircuitCourt image
UmatillaCountyCircuitCourt image


Umatilla County is located at 45°35'31"N 118°44'13"W (45.5919000, -118.7368300). It has 5 neighbors: Grant County, Union County, Morrow County, Wallowa County and Walla Walla County.

Umatilla County map

The largest city of Umatilla County is Hermiston with a population of 17,791. Other cities include, Pendleton population 16,593, Umatilla population 7,360, Milton-Freewater population 7,052 and Stanfield population 2,107. See all Umatilla County cities & populated places.

Umatilla County Populated Places

Cities, towns, neighborhoods & other populated places in Umatilla County.

City Name Population Title
Hermiston 17,791 City in Oregon, USA
Pendleton 16,593 City in Oregon, USA
Umatilla 7,360 City in Umatilla County, Oregon, United States
Milton-Freewater 7,052 City in Oregon, USA
Stanfield 2,107 City in Oregon, USA
Pilot Rock 1,507 City in Oregon, USA
Athena 1,140 City in Oregon, USA
Echo 705 City in Oregon, USA
Weston 650 City in Oregon, USA
Adams 359 City in Oregon, USA
Ukiah 194 City in Oregon, USA
Helix 191 City in Oregon, USA

Umatilla County has 5 neighbours.

  • Pendleton


The population of Umatilla County increased by 2.4% in 10 years.

Year Population % Change Method
2010 75,889 - census
2011 76,804 1.19% estimation process
2012 77,005 0.26% estimation process
2013 76,875 -0.17% estimation process
2014 76,685 -0.25% estimation process
2015 76,467 -0.29% estimation process
2016 76,686 0.29% estimation process
2017 77,120 0.56% estimation process
2018 77,421 0.39% estimation process
2019 77,950 0.68% estimation process
2020 77,752 -0.25% estimation process

Comitatul Umatilla, Comte d'Umatilla, Comte dUmatilla, Comté d'Umatilla, Comté dUmatilla, Condado de Umatilla, Condado han Umatilla, Contea di Umatilla, Hrabstwo Umatilla, Jumatila, Jumatilla, Okrug Jumatila, Quan Umatilla, Quận Umatilla, Umatilla, Umatilla Comitatus, Umatilla Kun, Umatilla Kūn, Umatilla konderria, Umatilla megye, Yumatila srjan, mqatʿt awmatyla, shhrstan awmatyla awrgn, umitilla ka'unti, you ma di la xian, yumatira jun, Округ Јуматила, Уматілла, Юматила, Юматилла, Յումատիլա շրջան, شهرستان اوماتیلا، اورگن, مقاطعة أوماتيلا, یومیٹیلا کاؤنٹی، اوریگون, উমিটিল্লা কাউন্টি, ユマティラ郡, 尤馬蒂拉縣

Oregon Other Counties (more counties)

County Name Population Title
Multnomah County 815,637 County in Oregon, United States
Portland 656,751 The twenty-sixth most populous city in the United States and the center of the Portland metropolitan area.
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 The capital of Oregon.
Eugene 173,236 The second most populous city in Oregon.
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 The most populous city in Washington County, Oregon.
Gresham 110,031 The second most populous city in Multnomah County, Oregon.
Yamhill County 107,664 County in Oregon, United States