Umatilla Reservation and Off-Reservation Trust Land
Umatilla Reservation and Off-Reservation Trust Land is a federal reservation with off-reservation trust land in Umatilla County, Oregon; and Columbia County, Washington, as the Census Bureau maps it. About 2,840 people live there (2020–2024 estimate). It covers 294 sq mi (762 km²) of land.
- Population, 2020–2024 estimate
- 2,840 ± 360
- What it is
- Federal reservation · Off-reservation trust land
- Counties
- Umatilla County, OR94% of its landColumbia County, WA6% of its land
- Land area
- 294 sq mi (762 km²)
- Median household income
- $73,750 ± $10,223
- Median home value
- $296,800 ± $25,054
- Water area
- 0.02 sq mi (0.04 km²)
- States
- Oregon, Washington
- Census code
- 4405
- Coordinates (central point)
- 45.657798, -118.522378
These coordinates mark a central point for the area, not an address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.
Communities in this area, largest first
- Mission (CDP)878 people
- Gopher Flats (CDP)382 people
- Tutuilla (CDP)365 people
- Riverside (CDP)362 people
- Kirkpatrick (CDP)258 people
- Cayuse (CDP)44 people
These places’ central points lie inside the area. People counts are American Community Survey 2020–2024 5-year estimates.
Before using this answer
These Census boundaries don’t decide tribal membership, jurisdiction or land status, and they aren’t a land acknowledgment. For services, enrollment or jurisdiction, ask the tribal government.