It is governed by Carmarthenshire County Council and Llanelli Rural council. It falls in the Llanelli parliamentary constituency. Llangennech is also the name of an electoral ward coterminous with the village and has its own community council. It was a coal mining community, with several local collieries mining steam coal. There is also a large Labour tradition in the village originating with the mine workers. There was a large Royal Navy depot in the village, which was closed in Ministry of Defence restructuring.