The Illtyd ward covers a residential part of Barry to the west of the town.

Barry College campus is in the ward as well as several schools, including the Welsh-medium Ysgol Gymraeg Bro Morgannwg.

[4] On 4 May 2017 the Illtyd ward was regained by the Conservatives, as part of a wider success across Barry and the Vale.

The three seats were won by Janice Charles, Tony Hampton and Marguerita Wright.

[6] Illtyd was also an electoral ward to the Vale of Glamorgan Borough Council between 1973 and 1996, electing three councillors.