Clark County
URL: https://knowledge.ivjn.us/en/places/il-clark-county.html

Clark County is a county of Illinois, United States.

## Overview

Clark County is a county of [Illinois](https://knowledge.ivjn.us/en/places/illinois.html), United States (FIPS il023), with a population of about 15,441[^geonames].

## Geography

- Coordinates: 39.3336, -87.7877
- Time zone: America/Chicago

Updated: 2026-10-29

Relations:
- Located in: Illinois https://knowledge.ivjn.us/en/places/illinois.html
- Contains places: Casey https://knowledge.ivjn.us/en/places/il-casey.html
- Contains places: Marshall https://knowledge.ivjn.us/en/places/il-marshall.html
- Contains places: Martinsville https://knowledge.ivjn.us/en/places/il-martinsville.html
- Contains places: West Union https://knowledge.ivjn.us/en/places/il-west-union.html
- Contains places: Westfield https://knowledge.ivjn.us/en/places/il-westfield.html

Mentioned in:
- Casey https://knowledge.ivjn.us/en/places/il-casey.html
- Marshall https://knowledge.ivjn.us/en/places/il-marshall.html
- Martinsville https://knowledge.ivjn.us/en/places/il-martinsville.html
- West Union https://knowledge.ivjn.us/en/places/il-west-union.html
- Westfield https://knowledge.ivjn.us/en/places/il-westfield.html

Sources:
- GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip