The Seaton Tramway is a 2 ft 9 in narrow gauge electric tramway in the East Devon district of South West England. The 3-mile (4.8 km) route runs alongside the Axe Estuary and the River Coly, running between the coastal resort of Seaton, the village of Colyford, and the ancient town of Colyton. For much of its route, it operates between the estuary and the Seaton Wetlands nature reserves, offering views of the wildlife of both.

A narrow-gauge railway is a railway with a track gauge narrower than 1,435 mm standard gauge. Most narrow-gauge railways are between 600 mm and 1,067 mm.