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About Marion

City in Illinois, United States
1839Established
16,855Population
16.7 sq miArea
518 ftElevation

Marion is a city in and the county seat of Williamson County, Illinois, United States. The population was 16,855 according to the 2020 census. It is part of a dispersed urban area that developed out of early 20th-century coal fields. Marion serves as the largest retail trade center in Southern Illinois with its central location along Interstate 57 and Illinois Route 13. The city is part of the Marion-Herrin micropolitan area and is a part of the Carbondale-Marion-Herrin, Illinois combined statistical area with 123,272 residents, the sixth-most populous Combined statistical area in Illinois.

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From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

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Marion

Illinois · IL
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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01