Balrothery East

Balrothery East (Irish: Baile an Ridire Thoir) is a feudal title of nobility and one of the baronies of Ireland. Originally part of the Lordship of Meath, it was then constituted as part of the old county of Dublin. Today, it lies in the modern county of Fingal. The barony was created by Hugh de Lacy, Lord of Meath as his own feudal barony, held directly from himself in capite. His vassals were commonly called "De Lacy's Barons". At the heart of the barony is the civil parish of Balrothery in the northwest of the barony. It is one of eight civil parishes in the barony.

It is bordered by the baronies of Balrothery West to the west and Nethercross to the south; by County Meath to the north and by the Irish Sea to the east.

It includes the towns of Balbriggan, Skerries, Rush, and Lusk.

It was organised soon after the Norman invasion of Ireland by Hugh de Lacy, Lord of Meath. Balrothery East formerly included Lambay Island, which is now part of the Barony of Nethercross.

List of subdivisions of County Dublin

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