Lydford railway station was a junction at Lydford between the Great Western Railway (GWR) and London and South Western Railway (LSWR) situated in a remote part of north-west Dartmoor in Devon, England.
The station, known then as "Lidford", was opened on 1 June 1865 with the Launceston and South Devon Railway, a 7 ft (2,134 mm) broad gauge line that connected with the to offer a service to Plymouth Millbay railway station. This line eventually became a part of the GWR.
On 12 October 1874 the LSWR line was opened from Okehampton railway station. This was a 4 ft 8 1⁄2 in (1,435 mm) standard gauge line that carried trains direct from London Waterloo station, whereas passengers to the GWR's London Paddington station had to travel on the branch line to Plymouth and then change onto a main line train.
On 17 May 1876 a junction was opened between the two lines and LSWR trains could now reach its new station at Devonport by running over the GWR's route, which was now mixed gauge. On 1 June 1890 a new line, built by the Plymouth, Devonport and South Western Junction Railway, gave the LSWR a route to Devonport independent of the GWR. The GWR line was converted to standard gauge on 20 May 1892.