The administrative county of Carmarthen and the first Carmarthenshire County Council was established in 1889 under the Local Government Act 1888.
[1] The council was headquartered in Llandovery until it moved to Carmarthen in 1907.
Construction of a new County Hall started in 1939 but, due to the World War, was not completed until 1955.
[2] The county council was abolished under the Local Government Act 1972 on 1 April 1974, with the creation of Dyfed.
[3] A new unitary authority of Carmarthenshire was later established, as a result of the Local Government (Wales) Act 1994, which came into force on 1 April 1996.