Below is a list of Romeoville IL zip codes. For your research we have also included Romeoville Area Code, Time Zone, UTC and the local Will County FIPS Code. Each Romeoville Illinois zip code has a center Longitude / Latitude point (the Romeoville center is -88.080497741699 / 41.640098571777). For your convenience we have also indicated if that zip code in Romeoville observes Daylight Savings time.