Twin Grove, Illinois

Twin Grove is an unincorporated community and census-designated place (CDP) in McLean County, Illinois, United States. As of the 2020 census, Twin Grove had a population of 1,524.

Geography
Twin Grove is in western McLean County on both sides of Illinois Route 9. It is 5 mi west of Bloomington, the county seat.

According to the U.S. Census Bureau, the Twin Grove CDP has an area of 3.97 sqmi, of which 0.01 sqmi, or 0.25%, are water. Kings Mill Creek flows southward through the western part of the community, leading to the Middle Fork of Sugar Creek, part of the Sangamon River watershed flowing west to the Illinois River.