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Welcome to Jefferson County ...

Time Zone: Jefferson County lies in the Central Time Zone (CST/CDT) and observes daylight saving time.

The community of Fairfield is the Seat for Jefferson County.

Jefferson County was founded January 21, 1839.

From the Census Estimates for 2019, <1> Jefferson had a population of 18,295 people. This is an increase of 8.66% since the last Census (which gave a population of 16,837 people in 2010).

At the time of the 2010 Census, Jefferson represented 0.55% of the total population of Iowa.

Below are some of the communities located in Jefferson County:

  • Batavia
    (10 miles [16.1 km] to the west)
    • Batavia is located in Jefferson County (IA)
    • Jump to our Gazetteer entry for Batavia
    • Population from the 2020 Census: 552 people
    • Jump to TripAdvisor's Tourism page for Batavia <2>
  • Fairfield
    (Less than 2 miles to the south)
    • Fairfield is located in Jefferson County (IA)
    • Jump to our Gazetteer entry for Fairfield
    • Population from the 2020 Census: 10,500 people
    • Jump to TripAdvisor's Tourism page for Fairfield <2>
  • Libertyville
    (6 miles [9.7 km] to the southwest)
    • Libertyville is located in Jefferson County (IA)
    • Jump to our Gazetteer entry for Libertyville
    • Population from the 2020 Census: 341 people
  • Lockridge
    (11 miles [17.7 km] to the east)
  • Maharishi Vedic City
    (3 miles [4.8 km] to the northwest)
    • Maharishi Vedic City is located in Jefferson County (IA)
    • Jump to our Gazetteer entry for Maharishi Vedic City
    • Population from the 2020 Census: 1,288 people
  • Packwood
    (9 miles [14.5 km] to the northwest)
    • Packwood is located in Jefferson County (IA)
    • Jump to our Gazetteer entry for Packwood
    • Population from the 2020 Census: 225 people
  • Pleasant Plain
    (9 miles [14.5 km] to the northeast)
    • Pleasant Plain is located in Jefferson County (IA)
    • Jump to our Gazetteer entry for Pleasant Plain
    • Population from the 2020 Census: 98 people

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.