1983–1997: The
Borough of Ogwr wards numbers 1, 2, 12 to 16, 18, and 20 to 23.
1997–2010: The Borough of Ogwr wards of Brackla, Cefn Cribwr, Coity Higher, Cornelly, Coychurch Lower, Laleston,
Morfa,
Newcastle,
Newcastle Higher,
Oldcastle, Porthcawl East, Porthcawl West, Pyle, and St Bride's Major.
2010–2024: The Bridgend County Borough electoral divisions of Brackla; Bryntirion, Laleston and Merthyr Mawr; Cefn Glas; Coity; Cornelly; Coychurch Lower; Litchard; Llangewydd and Brynhyfryd; Morfa; Newcastle; Newton; Nottage; Oldcastle; Pendre; Pen-y-fai; Porthcawl East Central; Porthcawl West Central; Pyle; and
Rest Bay.
2024–present: Under the 2023 review, the constituency was defined as being composed of the following wards of the
County Borough of Bridgend, as they existed on 1 December 2020: • Aberkenfig; Brackla; Bryncethin; Bryncoch; Bryntirion, Laleston and Merthyr Mawr; Cefn Cribwr; Cefn Glas; Coity; Coychurch Lower; Felindre; Hendre; Litchard; Llangewydd and Brynhyfryd; Morfa; Newcastle; Newton; Nottage; Oldcastle; Pendre; Penprysg; Pen-y-fai; Porthcawl East Central; Porthcawl West Central; Rest Bay; Sarn; Ynysawdre. As a result of the review, the seat was expanded into parts of the abolished constituency of
Ogmore, including the communities of
Aberkenfig,
St Bride's Minor,
Ynysawdre and
Pencoed. This was partly offset by the transfer of
Cornelly and
Pyle to the new constituency of
Aberafan Maesteg. Following a local government boundary review which came into effect in May 2022, the constituency now comprises the following wards of the County Borough of Bridgend from the 2024 general election: • Aberkenfig; Brackla East and Coychurch Lower; Brackla East Central; Brackla West; Brackla West Central; Bridgend Central; Bryntyrion, Laleston and Merthyr Mawr; Cefn Glas; Coity Higher; Newton; Nottage; Oldcastle; Pencoed and Penprysg; Pen-y-Fai; Porthcawl East Central; Porthcawl West Central; Pyle, Kenfig Hill and Cefn Cribwr (part); Rest Bay; and St Bride's Minor and Ynysawdre. ==Constituency profile==