Griderville, KentuckyGriderville is a rural unincorporated community in northern Barren County, Kentucky, United States.HistoryGeographyThe community is located in the north-central portion of Barren County, at the junction of U.S. Route 31E and Kentucky Route 70. US 31E leads south to Glasgow, and north to Hardyville and Hodgenville. KY 70 leads west to Cave City and the Mammoth Cave National Park, and east to Hiseville.Post officeGriderville is currently served by the Cave City post office by default with ZIP code 42127.