Llanycrwys is a community located in Carmarthenshire, Wales. Situated in the historical Cayo Hundred in the Union of Lampeter, it is situated near the River Cothi, and is separated from the parish of Caio by the Afon Twrch, which flows near the St. Davids church. The church is isolated, and was restored in 1892 by C. H. Purday of Ewan Christian, who had a porch on the western side, with a timbered gable.