Bylchau (Welsh pronunciationⓘ) is a hamlet in Conwy County Borough, Wales.

It is located at the junction of the A544 with the A543, some 5 miles to the south-west of Denbigh, and just a mile from the county border with Denbighshire.

The village has a church, which was consecrated on 27 October 1857, and dedicated to St Thomas.

[1] Together with the village of Llansannan, the residents of Bylchau elect community councillors to represent them on Llansannan Community Council.

This Conwy County Borough location article is a stub.