Llanddeusant lies within the Llansadwrn & Llangadog / Myddfai & Llanddeusant ward, which had a population of 2,412 at census 2001. The name, meaning "church of two saints", is supposed to originate from the fact that Teilo and Saint David are believed to have met there. The 'Old Red Lion Inn' is now a Youth hostel.
- Map sources for Llanddeusant, Carmarthenshire
- www.geograph.co.uk : photos of Llanddeusant and surrounding area
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