Dyfed (IPA: ['dɪ ved]) is a preserved county of Wales.
Dyfed was created by the Local Government Act 1972 on 1 April 1974. It covered the former counties of Cardiganshire, Carmarthenshire, Pembrokeshire and was divided into local government districts as so:
The Lord Lieutenant of Dyfed had previously been the Lord Lieutenant of Pembrokeshire, with the Lord Lieutenant of Cardiganshire and Lord Lieutenant of Carmarthenshire becoming Lieutenants. The Dyfed-Powys Police had been created a number of years earlier.
The Local Government (Wales) Act 1994 broke up Dyfed and restored the ancient counties on April 1, 1996: Cardiganshire (which renamed itself Ceredigion as soon as it was able), Carmarthenshire and Pembrokeshire. The name Dyfed was retained for purely ceremonial purposes such as Lieutenancy.