Tullyhaw (Irish: Teallach Eathach, which means 'the Territory of Eochaidh', an ancestor of the McGoverns, who lived c. 650 AD) is a Barony in County Cavan in Ireland.

The administration remained in the control of the local Irish dynasty and subject to the Brehon and Canon Law.

In 1584, Sir John Perrot formed the shire into a county in Ulster.

It was subdivided into seven baronies:[4] The last one, Tullyhaw, encompassed the mountains bordering on O'Rourke's country, and was left subject to the ancient tenures and exactions of their Irish lord.

This article related to the geography of County Cavan, Ireland is a stub.