St Twrog's Church is a small rural church at Bodwrog in Anglesey, North Wales. Built in the late 15th century in a medieval style, some alterations have been made but much of the original structure still remains. It has two 15th-century doorways (one later converted into a window) and some 15th-century windows. The bull's head decoration used on the church denotes a connection with the Bulkeleys of Beaumaris, a prominent north Wales family over several centuries. Set in a remote part of the countryside in the middle of Anglesey, it is dedicated to St Twrog, who was active in the late 5th and early 6th centuries. The church's tithes were paid for at least two hundred years to Jesus College, Oxford, which has historically strong links with Wales, and the college at one point built a house for the priest who served St Twrog's and a neighbouring parish.
The church is still used for worship by the Church in Wales, as one of seven churches in a Ministry Area. It is a Grade II* listed building, a national designation given to "particularly important buildings of more than special interest", in particular because it is regarded as "a good rural late Medieval church". It is built from rubble masonry with a slate roof. The interior is lit by gas lamps.