Below is a list of Darke County OH zip codes. For your research we have also included Darke County Area Code, Time Zone, UTC and the local County FIPS Code. Each Darke County Ohio zip code has a center Longitude / Latitude point (the Darke County center is -84.594200134277 / 40.152000427246). For your convenience we have also indicated if that zip code in Darke County observes Daylight Savings time.