Ynysybwl is an electoral ward covering the valley of the Nant Clydach in Rhondda Cynon Taf, Wales.
It elects two councillors to Rhondda Cynon Taf County Borough Council.
[3] The Ynysybwl ward was created in 1898 (127 years ago) (1898) for elections to Mountain Ash Urban District Council.
[3] Following a local government boundary review, the number of councillors was increased to two, effective from the 2022 Rhondda Cynon Taf County Borough Council election.
[7] Former Labour councillor Sue Pickering, who had been elected multiple times for the ward, did not stand for re-election.