Below is a list of Louisa County IA zip codes. For your research we have also included Louisa County Area Code, Time Zone, UTC and the local County FIPS Code. Each Louisa County Iowa zip code has a center Longitude / Latitude point (the Louisa County center is -91.237503051758 / 41.217700958252). For your convenience we have also indicated if that zip code in Louisa County observes Daylight Savings time.