Below is a list of Thornburg IA zip codes. For your research we have also included Thornburg Area Code, Time Zone, UTC and the local Keokuk County FIPS Code. Each Thornburg Iowa zip code has a center Longitude / Latitude point (the Thornburg center is -92.331398010254 / 41.452201843262). For your convenience we have also indicated if that zip code in Thornburg observes Daylight Savings time.