St David's Welsh Church, Rhosllannerchrugog, is in Broad Street, Rhosllannerchrugog, in Wrexham County Borough, Wales. The church was built in 1892 to a design by Douglas and Fordham of Chester. It consists of a nave and a north aisle. It was intended to have a chancel and a steeple at the northeast, but these were not built at the time. The church is constructed in Ruabon brick with some sandstone dressings. The west window is in Perpendicular style and the south porch has timberwork in its gable. A chancel was added in 1935–36 to a design by J. H. Swainson.