Interior
Single chamber plan, with aisleless nave and vestry adjoining the chancel to the N. W entrance, via the tower. The nave has a barrel-vaulted, boarded roof, with pierced ribs of conjoined oculi dividing it into 12 compartments (6 to each side). Central pavement of small bricks and slate margins; plain flanking pine pews. At the W end is a simple cylindrical font of sandstone with a tooled, circular limestone plinth; moulded base and quatrefoil decoration to the bowl. The pulpit is similar, square with broad, hollow-chamfered sides, on a plinth as before; moulded rail and quatrefoil oculi to front. The medieval Rood Screen is incorporated in fragment in a C19 Perpendicular screen. The lower section, consisting of an 8-bay arcaded dado, is primary; round arches with ocular tracery headstand foliated spandrels. The C19 upper section has 4 open ogee arches to either side of a broader central entrance in the usual manner; cusped decoration and ocular tracery above ogees, moulded Rood beam with foliated bosses.
Large pointed chancel arch with roll-moulded inner arch springing from corbels. The chancel is stepped-up from the nave and has a simple polychromed tiled pavement of red, black, green and yellow tiles. Simple pine reading desks and choir stalls. The sanctuary and altar are similarly stepped-up with similar, though more elaborate pavements. Oak altar rails carried on pilasters with sunk panel decoration and moulded bosses and capitals; curved brackets. The Altar table incorporates part of an early C17 predecessor, and has been doubled in length; gadrooned frieze and turned legs. Sandstone retable of 3 sections with a slightly-projecting central section having a rectangular niche with relief-carved cross; roll-moulded decoration and flanking blind oculi on 2 tiers, with moulded stringcourses; moulded cornice with brattishing to central section.
The vestry leads off to the N from the chancel via a broad segmental arch; this has an arcaded panelled screen to its lower half and a door to the L.
Stained and Painted Glass: the chancel S wall windows has good quality C13-style glass with Apostle figures, 3 to a light; in memory of Jane, wife of the Rev. Morgan, rector, d.1873, installed c1874. The windows have shouldered inner arches with roll-moulded decoration. The E window shows scenes from the life of Christ; to the memory of the Jones family of Llaithgwm. The nave N window (E) has one light showing the Good Shepherd; in memory S R C Price, d.1923, by A Seward and Co., of Lancaster.
Monuments: early C19 hatchment of the Price family of Rhiwlas on W wall. In the chancel floor is the inset marble tombstone of R J Price, d.1842 (to whom the hatchment may relate).
Within the W tower are several funerary memorials to the Price family of Rhiwlas, removed from the earlier church and relocated here. On the N wall is a painted slatestone wall memorial with white marble inscription tablets; this takes the form of a shallow obelisk on plinth and commemorates William Price of Rhiwlas, Esq., d. 1774 and the Hon. Elizabeth, d.1778; polychromed heraldry in white marble above, with motto scroll plus winged cherub (fragments of finial lie adjacent). To the R of this is a large Baroque wall monument of white and grey figured marble: erected in 1718 to the Prices of Rhiwlas. The monument consists of 2 large inscription tablets with central and flanking Composite pilasters, having relief-carved and polychromed coronets and trumpets in the frieze; moulded cornice above.
Two further memorial tablets are visible, both with simple architectural frames, one with segmental moulded pediment and cherub heads to the apron. Re-used in the wall are inscribed stones, one Romano-British, and two reused from the former Price chapel. These have (in raised letters): KP A RH QC FECIT K 1599 P.