Princes Risborough to Aylesbury Line

The Princes Risborough to Aylesbury Line is a rural branch line from Princes Risborough to Aylesbury in Buckinghamshire, England.

The line is single track throughout with a maximum speed of 40 mph.

The line was built as a single track broad gauge branch of the Wycombe Railway in 1863. The branch became part of the Great Western Railway when the latter took over the Wycombe Railway in 1867. The GWR converted the line to standard gauge in 1870. The branch was incorporated into the newly-formed Great Western and Great Central Joint Railway in 1906. Network SouthEast made the branch part of its Chiltern subdivision in the 1980s. Passenger services are now operated by Chiltern Railways.

The line is regularly used by freight services operated by Freightliner and DB Schenker. The trains, referred to as 'binliners', carry waste from London to a waste facility near the site of the former Great Central Railway station at Calvert. For this purpose, during Chiltern Railways' Evergreen 2 project the line was resignalled with two new signals at Little Kimble, one for each direction of travel. These allow two trains to travel in the same direction, thus allowing a passenger service to follow the freight train or vice versa.