South Glamorgan (Welsh: De Morgannwg) is a preserved county of Wales.

As well as Cardiff, the county included the main towns of Barry, Cowbridge, Llantwit Major and Penarth.

[2] Following the Local Government (Wales) Act 1994, South Glamorgan was abolished on 1 April 1996, with both district councils becoming unitary authorities.

These new authorities each also included small parts of Mid Glamorgan, with Wick, St Brides Major, and Ewenny transferred to the Vale of Glamorgan from the Ogwr district, while Pentyrch and Creigiau (from the Taff-Ely district) became part of Cardiff.

South Glamorgan continues in existence as a preserved county for purposes such as lieutenancy, and as such includes those communities.