The name Rhosddu is formed on the Welsh words rhos, "moor" or "rush pasture", and ddu, "black". It was originally a new ecclesiastical parish formed by an Order in Council in 1886, containing the townships of Acton, Bieston and Gourton (from the parish of Wrexham), the township of Borras Riffri (from the parish of Gresford), and the township of Stansty (from the parish of Gwersyllt). In 1972, Rhosddu reverted to the parish of Wrexham.
In civil terms the area of Rhosddu was in the civil parish of Stansty, which was part of the old Wrexham Municipal Borough. The administrative structures of the Municipal Borough were abolished in 1974, under the terms of the Local Government Act 1972. Rhosddu was created as one of the communities of Wrexham Maelor after a 1985 boundary review, which brought four new 'town' communities into being within the town of Wrexham itself (Rhosddu, Offa, Caia Park, and Acton).
St. James's church
The foundation stone of the new church, dedicated to St. James and built in Cefn sandstone to designs by W. Turner of Wrexham, was laid on 30 September 1874. It was opened for worship in January 1876, although it was not consecrated until 27 April 1886. The church is now a Grade II Listed building, being considered a good example of a late 19th-century church retaining many original features.
John Godfrey Parry-Thomas, the engineer and motor-racing driver, was the son of the curate of Rhosddu and lived in the area during his childhood.
Wrexham AFC played their home games in the 1881-82 and 1882-83 seasons at Rhosddu Recreation Ground (changing the club's name to Wrexham Athletic for one season), before moving back to the Racecourse Ground for the 1883-84 season, where they have remained ever since.
Public Houses: The Walnut This public house closed its doors in 2011 and has now been bought by a private investor to be turned into student accomidation, and has recently had planning permission to extend the original building into the old beer garden area.