Below is a list of Hiram OH zip codes. For your research we have also included Hiram Area Code, Time Zone, UTC and the local Portage County FIPS Code. Each Hiram Ohio zip code has a center Longitude / Latitude point (the Hiram center is -81.143600463867 / 41.309398651123). For your convenience we have also indicated if that zip code in Hiram observes Daylight Savings time.