Camlin Church, S.W. of Cross Hill Bridge, Poplar Road, Ballydonaghy, Crumlin, Co Antrim

Camlin Church stands on a ridge overlooking the River Crumlin, south-west of Cross Hill Bridge near Crumlin in County Antrim. This is a scheduled ancient monument.

The church is a derelict medieval rectangular single-cell building with gabled ends, constructed of fieldstones. The east gable stands fairly intact with a central window opening, slightly narrower towards the top but lacking architectural detail; the west gable survives to roughly half its original height; the side walls are much reduced. The north wall contains a large opening at its west end, probably marking the original main entrance. The south wall has a window opening of roughly segmental form, also without surviving detail.

The interior contains eight Gothic arched recesses, four on each side wall in the eastern half of the church. These have been variously described as sedilia, niches, or sepulchral arches, though their original function remains unknown. Two smaller recesses appear in the inner face of the east gable flanking the window, which may be identifiable as an aumbry and a piscina.

The church probably dates from the 13th century, though the date of foundation and founding details are unrecorded. The earliest documentary reference comes from the Taxation of the Dioceses compiled in 1306. The building remained in use through the mid-17th century—an ordination was held here on 1 December 1661 by Jeremy Taylor, Bishop of Down and Connor, as recorded in the Diocese of Connor register. Local tradition holds that the church was destroyed during the wars of James II, when the King's army maintained a depot at this location in 1689. By the 1830s it was described as "a venerable ruin overgrown with ivy".

The church stands within an irregularly shaped earth-banked enclosure with some remaining stone revetments. The grassed enclosure is ringed by mature trees along its perimeter bank and is entered through a pair of conical-capped rubble stone piers with an iron gate, now derelict. The site is surrounded by agricultural grazing land, with a medieval motte visible on the opposite bank of the River Crumlin.