Saint Clair County
URL: https://knowledge.ivjn.us/en/places/il-saint-clair-county.html

Saint Clair County is a county of Illinois, United States.

## Overview

Saint Clair County is a county of [Illinois](https://knowledge.ivjn.us/en/places/illinois.html), United States (FIPS il163), with a population of about 257,400[^geonames].

## Geography

- Coordinates: 38.4703, -89.9284
- Time zone: America/Chicago

Updated: 2026-10-29

Relations:
- Located in: Illinois https://knowledge.ivjn.us/en/places/illinois.html
- Contains places: Alorton https://knowledge.ivjn.us/en/places/il-alorton.html
- Contains places: Belleville https://knowledge.ivjn.us/en/places/il-belleville.html
- Contains places: Brooklyn https://knowledge.ivjn.us/en/places/il-brooklyn.html
- Contains places: Cahokia https://knowledge.ivjn.us/en/places/il-cahokia.html
- Contains places: Caseyville https://knowledge.ivjn.us/en/places/il-caseyville.html
- Contains places: Centreville https://knowledge.ivjn.us/en/places/il-centreville.html
- Contains places: Darmstadt https://knowledge.ivjn.us/en/places/il-darmstadt.html
- Contains places: East Carondelet https://knowledge.ivjn.us/en/places/il-east-carondelet.html
- Contains places: East Saint Louis https://knowledge.ivjn.us/en/places/il-east-saint-louis.html
- Contains places: Dupo https://knowledge.ivjn.us/en/places/il-dupo.html

Mentioned in:
- Alorton https://knowledge.ivjn.us/en/places/il-alorton.html
- Belleville https://knowledge.ivjn.us/en/places/il-belleville.html
- Brooklyn https://knowledge.ivjn.us/en/places/il-brooklyn.html
- Cahokia https://knowledge.ivjn.us/en/places/il-cahokia.html
- Caseyville https://knowledge.ivjn.us/en/places/il-caseyville.html
- Centreville https://knowledge.ivjn.us/en/places/il-centreville.html
- Darmstadt https://knowledge.ivjn.us/en/places/il-darmstadt.html
- East Carondelet https://knowledge.ivjn.us/en/places/il-east-carondelet.html
- East Saint Louis https://knowledge.ivjn.us/en/places/il-east-saint-louis.html
- Fairmont City https://knowledge.ivjn.us/en/places/il-fairmont-city.html

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