what county is antioch illinois
Location in Lake County. Coordinates: 42Â°27â²52â³N 88Â°06â²41â³W / 42.46444Â°N 88.11139Â°W / 42.46444; -88.11139Coordinates: 42Â°27â²52â³N 88Â°06â²41â³W / 42.46444Â°N 88.11139Â°W / 42.46444; -88.11139. Antioch Township is located in Lake County, Illinois, United States. The population was 27,745 at the 2010 census.