Below is a list of Otho IA zip codes. For your research we have also included Otho Area Code, Time Zone, UTC and the local Webster County FIPS Code. Each Otho Iowa zip code has a center Longitude / Latitude point (the Otho center is -94.149101257324 / 42.42259979248). For your convenience we have also indicated if that zip code in Otho observes Daylight Savings time.