The North British, Arbroath and Montrose Railway was a company established by Act of Parliament in 1871 to construct and operate a railway line from north of Arbroath via Montrose to Kinnaber Junction, 38 miles (61 km) south of Aberdeen. The company was originally a subsidiary of the North British Railway but was absorbed into its parent in 1880.

The North British Railway was a British railway company, based in Edinburgh, Scotland. It was established in 1844, with the intention of linking with English railways at Berwick. The line opened in 1846, and from the outset the company followed a policy of expanding its geographical area, and competing with the Caledonian Railway in particular. In doing so it committed huge sums of money, and incurred shareholder disapproval that resulted in two chairmen leaving the company.