The River Ashop is a river in the Derbyshire Peak District, England. Its source is on Black Ashop Moor, just east of the Pennine Way, and north of Kinder Scout.
The river flows approximately ten kilometres east, following the Sheffield to Manchester Snake Pass road through remote countryside, before emptying into Ladybower Reservoir, which itself flows into the River Derwent.
The only significant tributary of the River Ashop is the short River Alport.
