Kilcumreragh (Irish: Cill Chruimthir Fhiachrach)[1] is a civil parish which spans the counties of Westmeath and Offaly in Ireland. It is located about 23 kilometres (14 mi) west–south–west of Mullingar and 18 kilometres (11 mi) north–north–west of Tullamore.
Kilcumreragh also spans three baronies. It is one of 8 civil parishes in the barony of Moycashel (M), 4 civil parishes in the barony of Clonlonan (C) and 4 civil parishes in the Offaly barony of Kilcoursey (K), all in the Province of Leinster. The civil parish covers 9,280.6 acres (37.557 km2), 6,964.9 acres (28.186 km2) in County Westmeath and 2,315.7 acres (9.371 km2) in County Offaly.