The Trealaw electoral ward is coterminous with the borders of the Trealaw community and elects one county councillor to Rhondda Cynon Taf County Borough Council. Since 1995 representation has mainly flipped between the Labour Party and Plaid Cymru.
The Trealaw electoral ward, which shares its boundaries with the Trealaw community, selects one county councillor for Rhondda Cynon Taf County Borough Council. Representation in this ward has alternated primarily between the Labour Party and Plaid Cymru since 1995.