Rhondda was a local government district in the geographical area of the Rhondda Valley, south Wales.The district was initially created as Ystradyfodwg Local Government District from parts of Ystradyfodwg, Llanwonno and Llantrisant parishes, Glamorgan, in 1877, when the Local Government Act 1858 was adopted. A local board was formed to govern the area.The Local Government Act 1894 reconstituted the area as Ystradyfodwg Urban District, with an elected urban district council replacing the local board. It was renamed Rhondda Urban District in 1897 after the River Rhondda. In 1955 Rhondda received a charter of incorporation to become the Municipal Borough of Rhondda.The Local Government Act 1972 completely reorganised local government in Wales in 1974. The Borough of Rhondda, with an identical area to the municipal borough, was one of six local government districts of the new county of Mid Glamorgan from 1974 to 1996.The borough was abolished in 1996, with its area passing to the unitary Rhondda Cynon Taf county borough.