Forest and Frith is a civil parish in the County Durham unitary authority, in the ceremonial county of Durham, England. In the 2011 census it had a population of 163.The parish has an area of 7,002 hectares. It is bordered by the parishes of Stanhope to the north, Newbiggin to the east, Holwick to the south east and Lunedale to the south, in County Durham, and by the Eden District of Cumbria to the west, the western boundary being the River Tees and Cow Green Reservoir.