The Culcairn to Holbrook railway line is a short, closed, railway line in New South Wales, Australia. The line ran from the Main South railway line at Culcairn for 26 km east to the town of Holbrook.

The Main Southern Railway is a major railway in New South Wales, Australia. It runs from Sydney to Albury, near the Victorian border. The line passes through the Southern Highlands, Southern Tablelands, South West Slopes and Riverina regions.