The Mold Railway was a railway company that built a line in north-east Wales. The line linked Mold to Chester and it opened on 14 August 1849. The company built a mineral branch line to Ffrith, opened in November 1849. Mold itself was an important regional centre, and contained considerable mineral resources. The London and North Western Railway took over the company in 1859. As the mineral industry developed, steelmaking at Brymbo became dominant, and the LNWR arranged with the Great Western Railway to connect to that place.