The Derwent is a river in Yorkshire in the north of England.
The River Derwent catchment area includes the Upper Derwent, River Rye, River Hertford, Bielby Beck and Pocklington canal and their tributaries. It covers an area of 2057 square kilometres and includes the towns of Stamford Bridge, Malton, Pickering, Helmsley, Filey and Scarborough.
It rises on Fylingdales Moor in the North York Moors National Park, flows southwards through Forge Valley as far as its confluence with the river Hertford then westwards through the Vale of Pickering, south through Kirkham Gorge and the Vale of York and joins the River Ouse at Barmby on the Marsh.