The villages of Killucan (Irish: Cill Lucaine, Church of Lucan) and Rathwire (Irish: Ráth Guaire, Fort of Guaire) nestle closely together in gentle, rolling countryside in the east of the County Westmeath, Ireland. They have a combined population of 1,682 according to the 2011 census. Killucan is on the R156 road about 15 km (9.3 mi) from Mullingar and 60 km (37 mi) from Dublin.