South Pembrokeshire (Welsh: De Sir Benfro) was one of six local government districts of Dyfed, Wales from 1974 to 1996.
It was formed on 1 April 1974 under the Local Government Act 1972, from the following parts of the administrative county of Pembrokeshire:
The map shows the district as defined above. However, in 1981, the communities of Bletherston, Clarbeston, Llandeilo Llwydarth, Llandissilio West, Llangolman, Llanycefn, Llys y Fran, Maenclochog, Mynachlog-ddu, New Moat and Vorlan were transferred to Preseli district.
It was abolished on 1 April 1996, merging with its neighbouring district of Preseli Pembrokeshire to form a reconstituted Pembrokeshire unitary authority.