[2] The church is at the end of a gravel track in the countryside of central Anglesey, about 2.5 kilometres (1.6 mi) from Llangefni, the county town.

[2] The parish church is at the end of a gravelled track, off a country lane between the lower part of Talwrn and the hamlet of Ceint to the south.

[7] The current building was designed by the architect John Welch and erected in 1841, with the first service held on 6 July of that year.

[11] John Jones, who was Dean of Bangor Cathedral from 1689 to 1727, was also rector of St Ffinan's during that time, as it was one of the benefices attached to the deanery.

[13] The antiquarian Nicholas Owen was perpetual curate here from 1790 until his death in 1811; he is buried at St Tyfrydog's Church, Llandyfrydog, Anglesey.

[15] A survey in 1937 by the Royal Commission on Ancient and Historical Monuments in Wales and Monmouthshire noted a number of items that had been preserved from the old church.

The circular font, made of gritstone, dates from the 12th-century; it has a "very crude interlacing strap ornament", and has been fitted upon a more modern base.

[2] Samuel Lewis said that the new church was "a plain structure in the old English style, with strong buttresses, which have a good effect, being so well suited to the exposed situation of the building.

"[6] Writing in 1846, the priest and antiquarian Harry Longueville Jones said that the church, "a modern erection of the Pseudo-Norman style", stood in "a highly picturesque situation.