Marblehill is an unincorporated community in Pickens County, in the U.S. state of Georgia. History The community was named for a marble quarry near the town site. The name sometimes is spelled out as "Marble Hill". A post office was established at Marblehill in 1889. The ZIP Code for Marblehill is 30148 References Unincorporated communities in Pickens County, Georgia Unincorporated communities in Georgia (U.S. state)