what county is witt il in
Sponsored Topics. Witt is a city in Montgomery County, Illinois, United States. The population was 991 at the 2000 census, and 949 at a 2009 estimate. Witt is located at 39Â°15â²16â³N 89Â°21â²4â³W / 39.25444Â°N 89.35111Â°W / 39.25444; -89.35111 (39.254574, -89.350980).