Below is a list of Watseka IL zip codes. For your research we have also included Watseka Area Code, Time Zone, UTC and the local Iroquois County FIPS Code. Each Watseka Illinois zip code has a center Longitude / Latitude point (the Watseka center is -87.732803344727 / 40.776298522949). For your convenience we have also indicated if that zip code in Watseka observes Daylight Savings time.