Cardiff West (Welsh: Gorllewin Caerdydd) is a constituency[n 1] represented in the House of Commons of the UK Parliament since 2024 by Alex Barros-Curtis of the Labour Party.

A traditionally safe Labour seat, represented for 33 years by George Thomas (who became Speaker in 1976 and was re-elected without party affiliation in 1979).

1974–1983: The County Borough of Cardiff wards of Canton, Ely, Llandaff, Grangetown, Plasmawr, and Riverside.

1983–2010: The City of Cardiff wards of Caerau, Canton, Ely, Fairwater, Llandaff, Radyr and St Fagans, and Riverside.

2010–2024: The City of Cardiff wards of Caerau, Canton, Creigiau and St Fagans, Ely, Fairwater, Llandaff, Pentyrch, Radyr, and Riverside.