St David's Welsh Church, Colwyn Bay (Eglwys Dewi Sant) is in Rhiw Road, Colwyn Bay, Conwy County Borough, Wales. It is an Anglican church in the parish of Colwyn Bay with Bryn-Y-Maen, the deanery of Rhos, the archdeaconry of St Asaph, and the diocese of St Asaph. The church is situated behind St Paul's Church and is a Grade II listed building.
St David's Church was built in 1902–03 and designed by the Chester firm of architects Douglas and Minshull. It is a small church with an apsidal sanctuary. The west window is Perpendicular in style. Rising from the roof is a square bellcote with a pyramidal roof on which is an octagonal spirelet. Internally, the screen was made by a local blacksmith, David Jones.
As its name suggests, the services held in the church are in Welsh.