Below is a list of New Windsor IL zip codes. For your research we have also included New Windsor Area Code, Time Zone, UTC and the local Mercer County FIPS Code. Each New Windsor Illinois zip code has a center Longitude / Latitude point (the New Windsor center is -90.443397521973 / 41.201599121094). For your convenience we have also indicated if that zip code in New Windsor observes Daylight Savings time.