Below is a list of Gerlaw IL zip codes. For your research we have also included Gerlaw Area Code, Time Zone, UTC and the local Warren County FIPS Code. Each Gerlaw Illinois zip code has a center Longitude / Latitude point (the Gerlaw center is -90.601196289062 / 40.985500335693). For your convenience we have also indicated if that zip code in Gerlaw observes Daylight Savings time.