The Standedge Tunnels are four parallel tunnels through the Pennine hills at the Standedge crossing between Marsden in Kirklees, West Yorkshire and Diggle in Oldham, Greater Manchester in northern England. Three are railway tunnels and the other is a canal tunnel. Before boundary changes in 1974, both ends of the tunnels were in the West Riding of Yorkshire.

Marsden is a large village in the Colne Valley, in the metropolitan borough of Kirklees, West Yorkshire, England. It is in the South Pennines close to the Peak District which lies to the south. The village is 7 miles (11 km) west of Huddersfield at the confluence of the River Colne and Wessenden Brook. It was an important centre for the production of woollen cloth. In 2020, the village had an estimated population of 3,768.