County
· Iowa
Jefferson County
Jefferson County is a county located in the U.S. state of Iowa. As of the 2020 United States census, the population was 15,663. The county seat is Fairfield. The county was formed in January 1839, and was named for U.S. President Thomas Jefferson. Jefferson County comprises the Fairfield, IA Micropolitan Statistical Area.
15,647 population
(2021)
·
County area: Jefferson
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Cities and towns 7
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 164256
- FIPS state
- 19
- FIPS county
- 101
- FIPS place
- 99101
- Census record name
- COUNTY OF JEFFERSON
- Mailing address
- 51 E BRIGGS AVE, FAIRFIELD 52556