Interior
Wide nave with slender trussed collar rafter roof. The truss at the junction of nave with transepts is arch-braced from low stone corbels, and this has a similar arch-braced collar truss at the start of each transept, together defining the crossing. Walls plastered and painted. Quarry tile floor, encaustic tiles in the crossing and mosaic in the sanctuary.
Fittings: stone reredos of 5 bays on short trilobed red marble columns, each arch framing raised symbols of the faith. Pulpit, a carved limestone octagon raised over 4 steps, cinquefoil arches on similar short marble columns, and the panels filled with chequerwork, this and the reredos commemorating Samuel Owen Priestley, d.1872, and wife. Font, a plain octagonal stone bowl with an oak cover. Lectern, of oak, carved openwork between side posts. The altar rail is also of oak and arcaded. The organ, which originally had a barrel organ mechanism, was a gift to the church in 1867.
Glass: E Window, c1862, in memory of Mary Nanney, d.1849, and sister Anne Morgan; E nave windows, Annunciation and the Good Shepherd, good later C19 glass; S Transept, a Baptism of Christ, 1886, by Mayrick? of London; W window, SS Peter and Paul, for Ellis Anwyl Owen, rector 1837-46.
Monuments: Nave, N side from W: (a) Gothic marble commemorative tablet on slate, by R D Towyn, to John Williams, surgeon, of Talarfor, d.1875; (b) Slate gravestone of Owen Gruffydd, d.1730, 'the most honorable of all', one of the last bards in the bardic tradition who wrote political and religious cywyddau, and Christmas carols; (c) Gothic white marble tablet, the outer edge carved with flowers and fruits, by Hall of Derby, to Samuel Owen Priestly of Trefan and Tyddynmadoc coch, d.1872; (d) Small slate tablet to Lt Col Godfrey Drage of Cae Terfyn, d.1853, 'a gallant soldier'; (e) Marble tablet with cornice and urn over, against slate, to John Wynne Hughes of Trefan, d.1795; Nave, S wall, (f) Marble tablet, the cornice supporting a draped figure leaning on an upturned sword and holding a balance, to Henrietta Ellis Nanney of Gwynfryn, d.1815, and commemorating husband, David Ellis Nanney, barrister, d.1819; and (g) Polished limestone plaque to Dorothea Pughe-Jones of Ynysgain, d.1955.
Two unfixed boards inscribed with the Commandments and the Creed.