The Tarka Line, also known as the North Devon Line, is a local railway line in Devon, England, linking the city of Exeter with the town of Barnstaple via a number of local villages, operated by Great Western Railway (GWR). The line opened in 1851 from Exeter to Crediton and in 1854 the line was completed through to Barnstaple. The line was taken over by the London and South Western Railway (LSWR) in 1865 and later became part of the Southern Railway and then British Rail. In 2001, following privatisation, Wessex Trains introduced the name Tarka Line after the eponymous character in Henry Williamson's book Tarka the Otter. The line was transferred to First Great Western in 2006.

Barnstaple is a river-port town and civil parish in the North Devon district of Devon, England. The town lies at the River Taw's lowest crossing point before the Bristol Channel. From the 14th century, it was licensed to export wool from which it earned great wealth. Later it imported Irish wool, but its harbour silted up and other trades developed such as shipbuilding, foundries and sawmills. A Victorian market building survives, with a high glass and timber roof on iron columns.