Swainsley Tunnel is a tunnel on the route of the former Leek and Manifold Light Railway, which connected the market town of Leek with Hulme End, via Waterhouses, in Staffordshire, England.

It was built at the insistence of Sir Thomas Wardle, a director of the L&MLR and owner of the nearby Swainsley Hall, who did not want the line to spoil the view from his house.

[3] The trackbed was gifted to Staffordshire County Council and reopened in 1937 as a walking and cycling trail, the Manifold Way.

[6] Because of its narrow width, there are enforced regulations on car users and a weight limit of three tons.

The tunnel is a popular site for illegal street racing by both motorcyclists and motorists; Staffordshire Police have made the tunnel subject to a Section 59 Notice, which allows them to seize vehicles if drivers are found to be driving through it in an unsafe or aggressive manner.