St Gwenfaen's Church is in the village of Rhoscolyn, on the Isle of Anglesey, Wales.

The current church was erected in the Gothic-revival style, replacing the earlier building.

It "was built in 1875 and enlarged by the addition of a chancel in 1879 ... the architect is thought to have been Sir George Gilbert Scott."

It was designated as a Grade II listed building on 4 May 1971, as "a good example of a rural parish church, the simple Gothic style appropriate to its scale and site, and with rich interior fittings.

"[1] These include "a fine C20 memorial of copper, with Art Nouveau styled design, to the Rector the Revd.