Arklow (Irish: An tInbhear Mór) is a barony in County Wicklow, Ireland.

Arklow barony derives its name from the town of Arklow (from Old Norse Arnkells Lág, "Arnkell's land".

The Uí Garrchon in the north and the Uí Enechglaiss in the south are noted in Arklow barony from about the 7th century.

This was part of Ó Broin country after the 12th century, referred to as Crioch Branach.

[2] Below is a list of settlements in Arklow barony: This article related to the geography of County Wicklow, Ireland is a stub.