The River Welland is a river in the east of England, 56 km (35 m) long, and it has been a main waterway across the part of The Fens called "South Holland" for thousands of years. It rises near Market Harborough in Leicestershire, then flows eastwards to Ketton, Stamford, The Deepings, Crowland, Cowbit and Spalding, then into The Wash at Fosdyke Bridge.
It is one of the Fenland rivers which were laid out with washes. There are two channels between widely-spaced embankments with the intention that flood waters would have space in which to spread while the tide in the estuary prevented free egress. However, after the floods of 1947, new works such as the Coronation Channel were constructed to control flooding in Spalding and the washes are no longer, of necessity, pasture but may be used for arable farming.
The river, in its upper reaches, supports a wild brown trout population. Chub and perch dominate the middle reaches around Stamford, with pike, perch and zander inhabiting the lower lengths around Spalding.
Tributaries of the River Welland: