"The parish church of Kilmaurs is situated nearly half-a-mile south eastward of the burgh, at a small place called the Kirkton, consisting of some half dozen or so of cottages. The pre-Reformation church was given, during the reign of William, by Robert, the son of Wernebald, the progenitor of the Glencairn family, to the monks of Kelso, and was held by them till the Reformation and served by a vicar. In 1633, when Charles I erected the bishopric of Edinburgh, he granted to the dean of St. Giles the church of Kilmaurs, with all its tithes and revenues."
"In 1403, Sir William Cuninghame founded at Kilmaurs a collegiate church for a provost, six prebendaries, and two singing boys. At what period the present church was erected is uncertain, though, from the frequent repairs and alterations it seems to have undergone, there can enter into the composition of the fabric but little of the collegiate church of Sir William Cuninghame. That some portions, however, of the old building still exist, seems not improbable, from the circumstance that, in repairing the east end of the church in 1773, there was discovered, beneath a coating of plaster, a small priestly effigy cut on one side of a stone cube, and placed in a niche made in the wall. Below the effigy of the saint was a hollowed stone, supposed to have been the basin for holding the holy water."
"Originally, the edifice had been of an oblong form, but subsequently, by the additions of the 'Glencairn Vault' to its south side, and the 'Robertson Aisle' to the north one, it became an irregular cruciform building. The west gable, which carries a small belfry, is considered the most ancient part of the church. The Glencairn Aisle, for many years allowed to remain in an unroofed and torn-down condition, was fast verging to the fallen and extinguished state of the ancient noble house to whom it belonged, and many of whose members lie interred in its subterraneous chamber. Its complete ruin was, however, averted by Dame Charlotte Montgomerie Cuninghame, who, in 1844, had the ruined walls repaired and the opening to the vault guarded by a door of open ironwork. The monument within the aisle was erected in 1600 by James, seventh Earl of Glencairn, in commemoration of "himself, his first wife Dame Margaret Campbell, daughter of Sir Colin Campbell of Glenorchie, and their eight children".
"Ayrshire Nights Entertainment: A Descriptive Guide to the History, Traditions, Antiquities of the County of Ayr" by John MacIntosh of Galston, Ayrshire, published in 1894, by John Menzies & Co. of Kilmarnock, Dunlop and Drennan.
The present Kilmaurs Parish Church was built in 1888 on the site of the earlier churches and incorporating the Glencairn Aisle.