The internal door to the church is pointed and set into a camber-headed surround. Nave of 6 roof bays, the exposed collar beam trusses have braces carried down to walls posts and corbels. Corbel W of door is of an angel holding a shield, E an angel holding a parchment, other corbels with plain shield design on facing panels. Chancel is raised by 3 steps and has modern panelled wagon ceiling, painted with flowers. Sanctuary is raised by a further step and has a granite cusped panelled reredos across E wall.
Glass: E window delineating biblical scenes, to Field Marshall Henry, 1st Marquess of Anglesey, erected 1876. W window, Christ and Apostles, to Sir Robert Walter Otway Baronet CCB erected 1876. N wall, E window, Christ the resurrection and the life, to P P R Morgan JP Dis d.1900 and C T S H Morgan d.1906. S wall, E window, Christ, with coat of arms above, to Harry Clegg, Plas Llanfair.
Fittings: Font; hexagonal granite, supported on 4 pillars with cross carved within rectangle on facing panel, 1851. Pulpit; hexagonal granite, with cusped panelled design as for reredos. Pews; pine, installed in 1964, from a church in Machynlleth. Moulded sanctuary rail on brass plated stanchions, re-positioned in recent years. New organ by R E K Edwards of Liverpool, installed in 1979, pipework housed in a gallery in W end of the nave.
Monuments: Nave, N wall (a) grey marble tablet with pink columned surround bearing a wreath and cross with banner reading; TYDDLAN HYDANGAU, to the men of the parish who fell in the Great War 1914-1918, (b) white marble tablet with black surround by T Gaffin, Regent St. London, to T Schunk Esq of Carreg Bran d.1865. Chancel, S wall, pink granite tablet to the men of the parish who lost their lives in the 1939-1945 World War.
Miscellaneous: An oak litany desk, to Arfryn of this parish d.1943, gift of her brother E E Pritchard.