Derwent is the name of several rivers:

Australia:

• Derwent River, Tasmania

United Kingdom:

• River Derwent, Derbyshire, England; see also Upper Derwent Valley
• River Derwent, County Durham, England
• River Derwent, Cumbria, England, also the lake Derwent Water in the Lake District
• River Derwent, Yorkshire, England

and also of one settlement:

• Derwent, Derbyshire , England

The name Derwent is Old English and means "valley thick with oaks".