I have previously posted the link to the online Tithe Applotment Books, but such a valuable resources bears another reminder. The Tithe Applotment Books is a valuable research tool for Irish family historians searching pre-Famine Ireland. These books were made between the years of 1823-1837, and cover the parishes and townlands of rural/agricultural Ireland. They were used by the British government to determine the amount of tithes owed to the Church of Ireland by the occupiers of agricultural holdings of over one acre. Remember, tithes were owed the official Church of Ireland by persons of ALL religions. The books list the heads of households. The database is not only searchable by surname, but includes a browse function, so researchers can survey the parishes and townlands, also.
ORYou can bookmark one link to access the three major online databases--the Irish census, the Soldiers' Wills, and the Tithle Applotments-- on the Archives' site: