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Home >> State of Illinois >> Clark County  

Welcome to Clark County ...

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

The community of Marshall is the Seat for Clark County.

Clark County was founded in 1819 and was created by taking area from Crawford County.

From the Census Estimates for 2019, <1> Clark had a population of 15,465 people. This is a decrease of 5.33% since the last Census (which gave a population of 16,335 people in 2010).

At the time of the 2010 Census, Clark represented 0.13% of the total population of Illinois.

Below are some of the communities located in Clark County:

  • Casey
    (10 miles [16.1 km] to the west)
    • Jump to our Gazetteer entry for Casey
    • Casey is located in Clark County (IL)
    • Population from the 2020 Census: 2,585 people
    • Jump to TripAdvisor's Tourism page for Casey <2>
  • Marshall
    (6 miles [9.7 km] to the northeast)
  • Martinsville
    (4 miles [6.4 km] to the west)
    • Note: The GPS coordinates that we are using for Martinsville have been provided by the GNIS.<3> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Martinsville
    • Martinsville is located in Clark County (IL)
    • Population from the 2020 Census: 1,076 people
    • Jump to TripAdvisor's Tourism page for Martinsville <2>
  • Westfield
    (12 miles [19.3 km] to the northwest)

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.
<3>The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required.
 

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This page was last modified/updated: 26 Feb 2024