Sumpter
- County:
- Baker County
- County Seat:
- No
- Area (mi²):
- 2.182
- State:
- Oregon
Sumpter is a city located in Baker County, Oregon. Sumpter has a 2026 population of 207. Sumpter is currently declining at a rate of -0.96% annually and its population has decreased by 0% since the most recent census, which recorded a population of 207 in 2020.
The median household income in Sumpter is $26,471 with a poverty rate of 19.29%. The median age in Sumpter is 69.9 years: 74.4 years for males, and 69.4 years for females. For every 100 females there are 93.1 males.