
Jefferson
- County:
- Ashtabula County
- County Seat:
- Yes
- Area (mi²):
- 2.492
- State:
- Ohio
Jefferson is a village located in Ashtabula County, Ohio. Jefferson has a 2025 population of 3,162. It is also the county seat of Ashtabula County. Jefferson is currently declining at a rate of -0.35% annually and its population has decreased by -1.68% since the most recent census, which recorded a population of 3,216 in 2020.
The average household income in Jefferson is $64,131 with a poverty rate of 12.55%. The median age in Jefferson is 55.2 years: 33.7 years for males, and 63.2 years for females.