The Airedale Line is the name given to one of the rail services in the Metro area centred on West Yorkshire in northern England. The service is operated by Northern Rail, on the route connecting Leeds and Bradford with Skipton. Some services along the line continue to Morecambe or Carlisle. The route covered by the service was historically part of the Midland Railway.

The first section, between Leeds and Bradford (Forster Square station), was opened by the Leeds and Bradford Railway on 1 July 1846. During the Beeching Axe in the 1960s, a number of stations were closed, however the line and its major stations remained open. Some of the closed stations, such as Saltaire, were re-opened during the 1980s.

In 1991, the line was electrified at 25kV AC Overhead between Leeds and Skipton, and new British Rail Class 333 trains were introduced in the early 2000s. Investment in the line has seen passenger numbers grow, and now overcrowding on trains is a problem.

The route is described below: it originally included stations serving the following places, many of which are now closed: