Oregon

Umatilla

80,075
2020 population
1870
first census record
16
census records

About Umatilla

Umatilla, Oregon, first appears in the United States federal census in 1870, when it recorded a population of 2,916. At the most recent census, in 2020, its population stood at 80,075.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, 14 documented military engagements have been recorded within the county, among them Whitman Massacre Site, Cayuse War — Battle of Sand Hollows, Cayuse War – Great Emigrant Road Battle 1848, and 44 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202080,075
201075,889
200070,548
199059,249
198058,861
197044,923
196044,352
195041,703
194026,030
193024,399
192025,946
191020,309
190018,049
189013,381
18809,607
18702,916
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Battles & engagements in Umatilla

Military engagements that took place in Umatilla, Oregon.

Whitman Massacre Site
1847
Cayuse War — Battle of Sand Hollows
1848
Cayuse War – Great Emigrant Road Battle 1848
1848
Cayuse War — Battle of Sand Hollow (February 24, 1848)
1848
Battle of Sand Hollow (Cayuse War)
1848
Cayuse War – Battle of Sand Hollow
1848
Fort Henrietta Siege
1855
Umatilla Uprising 1855
1855
Battle of Umatilla Agency
1878
Bannock War — Umatilla Scouts Kill Chief Egan (July 12, 1878)
1878
Battle of Pilot Rock
1878
Battle of Umatilla Agency (Bannock War)
1878
Bannock War — Battle of Birch Creek / Pilot Rock (July 8, 1878)
1878
Bannock War – Umatilla Scouts Action
1878

Historic places in Umatilla

National Register of Historic Places listings in Umatilla, Oregon.

Echo Methodist Church
Echo
Umatilla Masonic Lodge Hall
Echo
US Post Office and Courthouse
Pendleton
Adams Odd Fellows Hall
Adams
St. Peter's Roman Catholic Church
Echo
Arlington Hotel
Echo
Umatilla County Library
Pendleton
Bowman Hotel
Pendleton
Umatilla Site (35 UM 1)
Umatilla
Greasewood Finnish Apostolic Lutheran Church
Adams
Browse all Oregonhistoric sites ›

Other counties in Oregon

Explore census history and historic records for more Oregon counties.

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Everything a full report reveals about Umatilla County, Oregon

This page charts the census history of Umatilla County, Oregon. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Umatilla

When does Umatilla first appear in the US census?
Umatilla, Oregon first appears in the federal census in 1870, with a recorded population of 2,916.
What is the population of Umatilla?
At the most recent federal census (2020), Umatilla had a recorded population of 80,075.
Were any battles fought in Umatilla?
14 documented military engagements took place in Umatilla, including Whitman Massacre Site, Cayuse War — Battle of Sand Hollows, Cayuse War – Great Emigrant Road Battle 1848.
How many historic places are in Umatilla?
44 sites are listed on the National Register of Historic Places in Umatilla, Oregon.
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