Below is a list of Old Fort OH zip codes. For your research we have also included Old Fort Area Code, Time Zone, UTC and the local Seneca County FIPS Code. Each Old Fort Ohio zip code has a center Longitude / Latitude point (the Old Fort center is -83.148696899414 / 41.239200592041). For your convenience we have also indicated if that zip code in Old Fort observes Daylight Savings time.