Below is a list of Oto IA zip codes. For your research we have also included Oto Area Code, Time Zone, UTC and the local Woodbury County FIPS Code. Each Oto Iowa zip code has a center Longitude / Latitude point (the Oto center is -95.893203735352 / 42.283298492432). For your convenience we have also indicated if that zip code in Oto observes Daylight Savings time.