The Mexborough & Swinton Tramways Company was a tramway system in South Yorkshire, England, serving Manvers Colliery, Wath upon Dearne and towns of Rotherham, Rawmarsh, Swinton and Mexborough. The company was owned by the National Electric Construction Co which ran other networks in England. The company became the Mexborough & Swinton Traction Company in 1929 after introduction of trolleybuses on all its routes only to become part of the British Electric Traction Group in 1931.