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Welcome to Union County ...

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

The community of Jonesboro is the Seat for Union County.

Union County was founded in 1818 and was created by taking area from Johnson County.

From the Census Estimates for 2019, <1> Union had a population of 16,653 people. This is a decrease of 6.08% since the last Census (which gave a population of 17,731 people in 2010).

At the time of the 2010 Census, Union represented 0.14% of the total population of Illinois.

Below are some of the communities located in Union County:

  • Alto Pass
    (8 miles [12.9 km] to the northwest)
  • Anna
    (Less than 2 miles to the southeast)
    • Anna is located in Union County (IL)
    • Jump to our Gazetteer entry for Anna
    • Population from the 2020 Census: 4,059 people
    • Jump to TripAdvisor's Tourism page for Anna <2>
  • Cobden
    (4 miles [6.4 km] to the north)
    • Cobden is located in Union County (IL)
    • Jump to our Gazetteer entry for Cobden
    • Population from the 2020 Census: 1,053 people
    • Jump to TripAdvisor's Tourism page for Cobden <2>
  • Dongola
    (8 miles [12.9 km] to the southeast)
  • Jonesboro
    (Less than 2 miles to the southwest)
  • Mill Creek
    (8 miles [12.9 km] to the south)
    • Mill Creek is located in Union County (IL)
    • Jump to our Gazetteer entry for Mill Creek
    • Population from the 2020 Census: 64 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.