Below is a list of Letts IA zip codes. For your research we have also included Letts Area Code, Time Zone, UTC and the local Louisa County FIPS Code. Each Letts Iowa zip code has a center Longitude / Latitude point (the Letts center is -91.238403320312 / 41.328300476074). For your convenience we have also indicated if that zip code in Letts observes Daylight Savings time.