West Devon is a local government district with borough status in Devon, England. Its council is based in Tavistock, the borough's largest town. The borough also includes the towns of Hatherleigh, North Tawton and Okehampton, along with numerous villages and surrounding rural areas.

A large area in the south-east of the borough lies within the Dartmoor National Park, and part of the south-west of the borough lies within the Tamar Valley Area of Outstanding Natural Beauty.

The neighbouring districts are Torridge, Mid Devon, Teignbridge, South Hams and Cornwall.

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

The new district was named West Devon, reflecting its location within the wider county.

On 27 April 1982 the district was awarded borough status, allowing the chair of the council to take the title of mayor.

West Devon Borough Council provides district-level services. County-level services are provided by Devon County Council. The whole borough is also covered by civil parishes, which form a third tier of local government.

In the parts of the borough within the Dartmoor National Park, town planning is the responsibility of the Dartmoor National Park Authority. The borough council appoints two of its councillors to serve on the 19-person National Park Authority.