Castlereagh (County Roscommon barony)

Castlereagh () is a barony in County Roscommon, Ireland. It is named after the town of Castlerea within the barony. Its area in 1891 was .
It contains five civil parishes: Ballintober, Baslick, Kilkeevin, Kilcorkey, and Kiltullagh; including the towns of Ballinlough, Bellanagare, Castlerea, and Cloonfad.
History.
Castlereagh barony was anciently part of the territory of the Síol Maelruain, ruled by the Flynn (Ó Floinn) family, whose name survive in the large lake in the barony, Lough O'Flynn.
From the 18th century onward the Wills and Sandford families were the main landlords (see: Baron Mount Sandford).
List of settlements.
Below is a list of settlements in Castlereagh barony: