Below is a list of South Beloit IL zip codes. For your research we have also included South Beloit Area Code, Time Zone, UTC and the local Winnebago County FIPS Code. Each South Beloit Illinois zip code has a center Longitude / Latitude point (the South Beloit center is -89.03980255127 / 42.486099243164). For your convenience we have also indicated if that zip code in South Beloit observes Daylight Savings time.