Below is a list of Utica IL zip codes. For your research we have also included Utica Area Code, Time Zone, UTC and the local La Salle County FIPS Code. Each Utica Illinois zip code has a center Longitude / Latitude point (the Utica center is -88.990898132324 / 41.342998504639). For your convenience we have also indicated if that zip code in Utica observes Daylight Savings time.