Castlereagh (County Down barony)

Castlereagh (,) is the name of a former barony in County Down, present-day Northern Ireland.  It spanned the north-eastern area of the county bordering the baronies of: Ards to the east; Belfast to the north; Iveagh to the west south; and Dufferin, Kinelarty, and Lecale to the south.  By 1841 the barony was divided into Castlereagh Lower and Castlereagh Upper. 

References

Category:County Down
Category:Baronies of County Down
Category:Former baronies of Ireland
Category:Early Modern Ireland