KILMACUMSY, or KILMACUNSY, a parish, in the barony of BOYLE, county of ROSCOMMON, and province of CONNAUGHT, 4 miles (N. W.) from Elphin, on the road from Boyle to Roscommon ; containing 2396 inhabitants. Much of its surface is occupied with gentle elevations of limestone and limestone gravel, in which are several extensive natural caverns. It is a vicarage, in the diocese of Elphin, forming part of the union of Ardclare ; the rectory forms part of the corps of the precentorship of Elphin cathedral. The tithes amount to £92. 6. 2., which is equally divided between the precentor and the vicar. In the R. C. divisions it is part of the union or district of Elphin.