Umatilla County, Oregon
A county in Oregon, ranked 14 of 36 by population.
CountyFIPS 41059
- Population
- 81,119
- +1,227 (+1.5%) since 2020
- Land area
- 3,215
- square miles. A further 0.5% of the total area is water
- Population density
- 25.2
- people per square mile, computed rather than published
- County seat
- Pendleton
- Seat of county government.
- Established
- 1862
- 163 years ago
- Largest city
- Hermiston city
- Population 19,906.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.
Satellite view
Aerial imagery of Umatilla County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.
Where Umatilla County ranks
Position among the 36 counties of Oregon, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.
| Measure | Value | In Oregon | Nationally |
|---|---|---|---|
| Population | 81,119 | 14th of 36 | 723rd of 3,144 |
| Land area | 3,215 sq mi | 8th of 36 | 160th of 3,144 |
| Population density | 25.2 per sq mi | 18th of 36 | 2,061st of 3,144 |
| Median household income | $67,728 | 19th of 36 | 1,363rd of 3,143 |
Full data for Umatilla County
| Measure | Value | Source and vintage |
|---|---|---|
| Population | 81,119 | Vintage 2025 Population Estimates |
| Population in 2020 | 79,892 | Vintage 2025 Population Estimates |
| 2020 estimates base? | 80,071 | Vintage 2025 Population Estimates |
| Land area | 3,215 sq mi | 2025 Gazetteer Files |
| Water area | 16.1 sq mi | 2025 Gazetteer Files |
| Total area | 3,232 sq mi | 2025 Gazetteer Files |
| Population density? | 25.2 per sq mi | Computed: Vintage 2025 estimates divided by 2025 Gazetteer land area |
| Median household income | $67,728 | American Community Survey 2020-2024 5-Year Estimates |
| Median home value | $282,600 | American Community Survey 2020-2024 5-Year Estimates |
| Median age | 36.9 | American Community Survey 2020-2024 5-Year Estimates |
| Households | 28,707 | American Community Survey 2020-2024 5-Year Estimates |
| Housing units | 32,199 | American Community Survey 2020-2024 5-Year Estimates |
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.
How the population changed
The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:
- Births minus deaths
- +58
- 855 births, 797 deaths
- Net migration
- +96
- More people moved in than moved out.
Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.
The 7 areas bordering Umatilla County
Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.
| Bordering area | State | Shared border | Population |
|---|---|---|---|
| Union County | Oregon | 107 mi | 25,900 |
| Morrow County | Oregon | 79 mi | 12,602 |
| Walla Walla County | Washington | 48 mi | 62,361 |
| Grant County | Oregon | 32 mi | 7,075 |
| Benton County | Washington | 23 mi | 221,722 |
| Wallowa County | Oregon | 9.9 mi | 7,595 |
| Columbia County | Washington | 0.9 mi | 4,141 |
Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.
All 36 counties of Oregon
Open the interactive Oregon county map, or jump straight to any of them.
- Baker County
- Benton County
- Clackamas County
- Clatsop County
- Columbia County
- Coos County
- Crook County
- Curry County
- Deschutes County
- Douglas County
- Gilliam County
- Grant County
- Harney County
- Hood River County
- Jackson County
- Jefferson County
- Josephine County
- Klamath County
- Lake County
- Lane County
- Lincoln County
- Linn County
- Malheur County
- Marion County
- Morrow County
- Multnomah County
- Polk County
- Sherman County
- Tillamook County
- Umatilla County
- Union County
- Wallowa County
- Wasco County
- Washington County
- Wheeler County
- Yamhill County
Data on this page last rebuilt 30 August 2026. How these figures are produced.