The oldest record of a chapel in the village is the Tynewydd Calvinistic Methodists chapel which was built around 1774.[1] The old Ysgol Gynradd Caio stands next to the church, and was built in 1869. It taught primarily through the medium of Welsh, but closed in 2012.
Other amenities include Caio Post Office (closed in the 1990s) and a public house, the Brunant Arms. At the turn of the 20th century there were several public houses, the "Brunant Arms", the "Sexton's Arms", which was run out of someone's front room,[3] and the "King's Head Inn".[4]
In 1966 BBC Wales produced the documentary "A Village Called Caio" about rural life in rural West Wales. They paid a retrospective visit in 2008,[5] to see how the village had changed.