Below is a list of Hanover IL zip codes. For your research we have also included Hanover Area Code, Time Zone, UTC and the local Jo Daviess County FIPS Code. Each Hanover Illinois zip code has a center Longitude / Latitude point (the Hanover center is -90.277099609375 / 42.255401611328). For your convenience we have also indicated if that zip code in Hanover observes Daylight Savings time.