Fenland is a local government district in Cambridgeshire, England. It was historically part of the Isle of Ely. The district covers around 500 square kilometres (190 sq mi) of mostly agricultural land in the extremely flat Fens. The council is based in Fenland Hall, in March. Other towns include Chatteris, Whittlesey and Wisbech, the largest of the four.

Since 2017 the district has been a constituent member of the Cambridgeshire and Peterborough Combined Authority, led by the directly-elected Mayor of Cambridgeshire and Peterborough.

The neighbouring districts are East Cambridgeshire, Huntingdonshire, Peterborough, South Holland and King's Lynn and West Norfolk.

The district was formed on 1 April 1974 under the Local Government Act 1972. The new district covered the area of six former districts, which were all abolished at the same time:

The new district was named Fenland, referencing its position within the Fens.

Fenland District Council provides district-level services. County-level services are provided by Cambridgeshire County Council. The whole district is also covered by civil parishes, which form a third tier of local government.

The council has been under Conservative control since 1999.

The first election to the council was held in 1973, initially operating as a shadow authority alongside the outgoing authorities until the new arrangements came into effect on 1 April 1974. Political control of the council since 1974 has been as follows: