What is the population of Umatilla County?

The population of Umatilla County, OR is 77,752.

Where is Umatilla County located?

Umatilla County, OR is located at latitude 45.5919000 and longitude -118.7368300. It is in United States.

What is the area of Umatilla County?

The area of Umatilla County, OR is 8369 km².

What is the elevation of Umatilla County?

Umatilla County, OR has an elevation of 446 meters (1463 feet) above sea level.

What time zone is Umatilla County in?

Umatilla County, OR is in the America/Los_Angeles time zone.

How has the population of Umatilla County changed?

The population of Umatilla County, OR has increased from 75,889 (2010) to 77,752 (2020), a change of 2.5%.

Umatilla County, Oregon

Umatilla County: county in Oregon, United States

About

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 164 years ago in 1861.

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

County Snapshot

Umatilla County at a glance

Umatilla County currently has 12 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Oregon counties

Open related pages

Largest city

Hermiston

Population 17,791

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%
Latitude & Longitude	45.5919,-118.7368
Named for	Umatilla River
Altitude	3,871 feet / 1180 meters
Capital	Pendleton
Establishment	January 01, 1862
Time Zone	America/Los_Angeles
Local time	00:47:44 (19th April 2026)
Density	9 Pop. per km² as of 2020
Population growth	2.4% (2010-2020)
Weather	45℉ Mostly Cloudy 7-days weather

UmatillaCountyCircuitCourt image

Geography

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

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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

Weather

45°F

Mostly Cloudy

10 mph SE Saturday Night

Mostly cloudy, with a low around 45. Southeast wind around 10 mph.

7-Day Forecast

Official website of Umatilla County

Official Website

Umatilla County has 5 neighbours.

Grant County county in Oregon, United States
Union County county in Oregon, United States
Morrow County county in Oregon, United States
Wallowa County county in Oregon, United States
Walla Walla County county in the state of Washington, United States

Pendleton

Demographics

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