[1] Llandeilo Rural District Council was responsible for housing, sanitation and public health and also had some control over roads and water supply.
The Ammanford Urban District was created in 1903 out of parts of the parishes of Betws and Llandybie.
[3] In 1912, the Cwmamman Urban District was formed, taking on parts of the parishes of Betws and Llandeilo Fawr.
The Llandilo Fawr Rural District covered the parishes of Betws, Brechfa, Llandeilo Fawr (Rural), Llandybie, Llandyfeisant, Llanegwad, Llanfihangel Aberbythych, Llanfihangel Cilfragen, Llanfynydd, Llansawel, Talley and Quarter Bach.
[5] The district was abolished following local government reorganisation in 1974, with the area becoming part of the new borough of Dinefwr.