Below is a list of Garnavillo IA zip codes. For your research we have also included Garnavillo Area Code, Time Zone, UTC and the local Clayton County FIPS Code. Each Garnavillo Iowa zip code has a center Longitude / Latitude point (the Garnavillo center is -91.235000610352 / 42.866901397705). For your convenience we have also indicated if that zip code in Garnavillo observes Daylight Savings time.