County Calhoun is located in the state of Illinois. Calhoun is spread between the coordinates of +39.0431671 Latitude and -90.65706358 Longitude. Calhoun has 8 zip codes, 5 cities, 1 area code and 3 post offices.
Below you will find more info about Calhoun and also zip codes, cities, area codes and the post offices that belong to this county.