Manordeilo is a small village situated in the county of Carmarthenshire, South Wales. The village lies south west of Llangadog and to the north east of Llandeilo. Resting close to the banks of the River Tywi, which is famed for its trout and salmon fishing, Manordeilo lies in the valley of the River Tywi and is also situated 1.2 miles from the Afon Dulais.
The River Dulais has it's source at Mynydd y Drum and eventually joins the River Neath. The Nant-clawdd-mawr flows by the village on its way to the River Tywi.
There are a number of walks and rights of way close to Manordeilo and the more determined walkers will appreciate the proximity of the village to Bethlehem and Llangadog from where it is possible to join the Brecon Beacons Way, one of Wales' most popular walking trails.