The roof has exposed closely spaced chamfered braced collared trusses. The chancel and S chapel have chamfered arches on shaped corbels; the chancel arch is decorated with stiff-leafed foliage, that to L bears a carved eagle and that to R a lamb. The chancel is raised by 4 steps and the sanctuary a further step up to a floor of encaustic tiles. The church fittings are C19 and early C20, the sanctuary rail is moulded and is on shaped balusters with shaped and pierced brackets. The early C20 reredos is of recessed panels; the centre raised under a pierced floriate frieze, the panels cusped with floriate carving in the spandrels. In the N wall of the chancel there is a trefoil headed recess, and on the S wall a stone tablet to Reverend John Jones of Plas Gwyn d1727 and Reverend Thomas Owen d1812.
The S chapel contains a number of memorials to members of the Jones, Panton and Vivian families of Plas Gwyn:
On the E wall there is a marble memorial tablet set in a corbelled frame with pointed pediment to John Panton Jones d1830, below there is a stone wreath memorial to Constance Emily Vivian d1905, wife of Claud Hamilton Vivian. To the R is a bronze tablet to Charles Crespigny II Baron Vivian d1886 and Mary Elizabeth, Baroness Vivian, and to far R is a marble memorial to Paul Panton Esq, eldest son of Paul Panton of Bagillt, d1882.
On the S wall, flanking the window, are: to L a scrolled memorial tablet to Thomas Williams of Tan y Graig d1851, and to R a marble memorial with cherub''''''''s face above and skull and crossbones below, to William Jones, Counsellor at Law, d1775.
On the W wall are 2 marble memorials, to S with open moulded pediment above and angel below to Jane Panton d1764; that to N to Hugh Williams, son of John Williams of Tû Frû by Elizabeth his wife, only daughter of Rowland Whyte of Fryers Esq d1722 with arms Argent, 2 foxes in saltire gules, a crescent in chief for difference (Cadrod for Williams) impaling Collwyn for Whyte.
Memorials along the N wall of the nave including a marble memorial to Hugh Williams of Tu Fru d 1768, son of John Williams d1771: the tablet is corbelled under an open pediment with an urn in the tympanum; below is the family crest, arms quarterly i and iv Cadrod (as above) ii Llywarch iii Collwyn.
There is a small bronze tablet on the W wall to Owen Owens d1774, Elizabeth Owens d1797 and Richard Owens d1810, also Jane Morris, mother of above d1808. Set in the floor of the vestry below is an early C18 gravestone
The octagonal C19 font has chamfered angles and a cross to each principal face and rests on a shaped, chamfered shaft and plinth.