Jefferson County Flag

Jefferson County

State:
Oregon
County Seat:
Madras

Jefferson County's estimated 2025 population is 25,714 with a growth rate of 0.51% in the past year according to the most recent United States census data. Jefferson County is the 24th largest county in Oregon. The 2010 population was 21,662 and has seen a growth of 18.71% since that time.

25,714
Total Population
14
Population Density (mi²)
24
Population Rank (State)
130 0.51%
Annual Population Growth

Jefferson County Population

Demographics

Economics and Income Statistics