Below is a list of Sandwich IL zip codes. For your research we have also included Sandwich Area Code, Time Zone, UTC and the local Dekalb County FIPS Code. Each Sandwich Illinois zip code has a center Longitude / Latitude point (the Sandwich center is -88.624198913574 / 41.645698547363). For your convenience we have also indicated if that zip code in Sandwich observes Daylight Savings time.