The Montrose Branch of the Lehigh Valley Railroad was a branch line that operated in Wyoming and Susquehanna County, Pennsylvania from 1872 to 1976. Originally opened as a 3 ft (914 mm) narrow gauge under the control of the Lehigh Valley, it was converted to standard gauge in 1903, several years after the Lehigh Valley acquired complete control of the railroad. It was abandoned in 1976 when the Lehigh Valley was merged into Conrail.