Below is a list of Dahlgren IL zip codes. For your research we have also included Dahlgren Area Code, Time Zone, UTC and the local Hamilton County FIPS Code. Each Dahlgren Illinois zip code has a center Longitude / Latitude point (the Dahlgren center is -88.684700012207 / 38.198101043701). For your convenience we have also indicated if that zip code in Dahlgren observes Daylight Savings time.