KILLADOON, a parish, in the barony of NORTH SALT, county of KILDARE, and province of LEINSTER, 1? mile (S. W.) from Celbridge, on the road from that place to Clane; containing 426 inhabitants. It is bounded on the south and east by the river Liffey, and comprises the mansion and park of Killadoon, the handsome seat of the Earl of Leitrim. It is a rectory and vicarage, in the diocese of Dublin, forming part of the union of Celbridge; the tithes amount to #100. In the R. C. divisions it also forms part of the union or district of Celbridge.