Below is a list of New Athens IL zip codes. For your research we have also included New Athens Area Code, Time Zone, UTC and the local Saint Clair County FIPS Code. Each New Athens Illinois zip code has a center Longitude / Latitude point (the New Athens center is -89.880798339844 / 38.316699981689). For your convenience we have also indicated if that zip code in New Athens observes Daylight Savings time.