Yarm is a small town and
civil parish in the
unitary authority of
Stockton-on-Tees in North East England. The population of the ward in Stockton Unitary Authority was 9,745 at the
2011 census. It is on the south bank of the
River Tees and for ceremonial purposes is in the county of
North Yorkshire. The bridge at Yarm marked the furthest reach of tidal flow up the River Tees until the opening, in 1995, of the
Tees Barrage, which now regulates river flow above
Stockton. As the last bridge on the river before the sea, it was superseded by a new toll bridge opened in Stockton in 1771. The oldest part of the town, around the High Street, is situated in a loop of the river and the newer parts of the town extend to the point where the
River Leven meets the River Tees.