There are six Local Nature Reserves in Carmarthenshire: Pembrey Burrows and Saltings, Ashpits Pond and Pwll Lagoon, North Dock Dunes, Carreg Cennen, Glan-yr-Afon, Kidwelly, and Morfa Berwig, Bynea.
Ceir chwe Gwarchodfa Natur Leol yn Sir Gaerfyrddin: Twyni Tywod a Morfa Pen-bre, y Pwll Lludw a Merllyn y Pwll, Twyni Doc y Gogledd, Carreg Cennen, Glan-yr-Afon, Cydweli, a Morfa Berwig, y Bynea.