The Caledonian Railway (Brechin) Ltd is a private limited company formed by a group of steam railway enthusiasts, the Brechin Railway Preservation Society, with the object of operating a railway service on the former Caledonian Railway line between Brechin and Montrose, Angus, Scotland. This line was built by the Aberdeen Railway in the 1840s. It closed for passenger traffic during the early 1950s with final closure undertaken by British Rail in 1981.

Brechin is a town and former royal burgh in Angus, Scotland. Traditionally Brechin was described as a city because of its cathedral and its status as the seat of a pre-Reformation Roman Catholic diocese, but that status has not been officially recognised in the modern era.