Illiopolis, Illinois

human settlement in Illinois, United States of America

Illiopolis is a village in Sangamon County, Illinois, United States. The population was 846 at the 2020 census.[1] It is part of the Springfield, Illinois Metropolitan Statistical Area.

Illiopolis is located at 39°51′5″N 89°14′50″W / 39.85139°N 89.24722°W / 39.85139; -89.24722 (39.851351, -89.247131).[2]

The name was formed from Illinois and -polis, a Greek suffix meaning "city".[3]


  1. "Illiopolis village, Illinois". United States Census Bureau. Retrieved September 23, 2023.
  2. "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
  3. Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 165.