Randolph is an unincorporated community in Coos County, Oregon, United States, founded as a "black sand" gold mining boomtown in th…Randolph is an unincorporated community in Coos County, Oregon, United States, founded as a "black sand" gold mining boomtown in the 1850s. Although it is considered a ghost town because there are no significant structures left at the site, the USGS classifies Randolph as a populated place. It is on the north bank the Coquille River about 7 miles north of Bandon and about 3 miles east of the Pacific Ocean.