Flintstone is an unincorporated community and census-designated place in Allegany County, Maryland, United States. As of the 2010 census it had a population of 177. It is part of the Cumberland, MD-WV Metropolitan Statistical Area. Flintstone lies between the southern foot of Tussey Mountain and a water gap in Warrior Mountain formed by Flintstone Creek, a tributary of Town Creek, which flows south to the Potomac River.