Below is a list of Grethel KY zip codes. For your research we have also included Grethel Area Code, Time Zone, UTC and the local Floyd County FIPS Code. Each Grethel Kentucky zip code has a center Longitude / Latitude point (the Grethel center is -82.647499084473 / 37.490699768066). For your convenience we have also indicated if that zip code in Grethel observes Daylight Savings time.