The Wilsontown, Morningside and Coltness Railway was a railway opened in 1845, primarily for mineral traffic, although a passenger service was run sporadically. The line ran from a junction with the Wishaw and Coltness Railway at Chapel, to Longridge, in South Central Scotland, and it was extended to Bathgate in 1850 after takeover by the Edinburgh and Glasgow Railway. It was built to open up further coal deposits and to connect the Wilsontown Ironworks, although it did not actually reach Wilsontown. In common with the other "coal railways" with which it connected, it adopted the track gauge of 4 ft 6 in, often referred to as Scotch gauge.
Always short of money, the railway was not commercially successful, but in giving access to a developing mineral area, it was taken over by the Edinburgh and Glasgow Railway in 1849, but it retained its independent management for some years. None of the line is still in use except for a very short length at Polkemmett Junction immediately south of Bathgate, which carries the Airdrie - Bathgate - Edinburgh passenger service.