Below is a list of Defiance County OH zip codes. For your research we have also included Defiance County Area Code, Time Zone, UTC and the local County FIPS Code. Each Defiance County Ohio zip code has a center Longitude / Latitude point (the Defiance County center is -84.515899658203 / 41.341400146484). For your convenience we have also indicated if that zip code in Defiance County observes Daylight Savings time.