Castlecaulfield (Irish: Baile Uí Dhonnaíle, meaning 'town or territory of O'Donnelly'[1]) is a village in the south-east of County Tyrone in Northern Ireland.

[2] The Caufeild family, from which the village derives its name (although spelt differently for the last few hundred years), were also responsible for founding the settlement of Caulfeild, West Vancouver, Canada in 1898/99.

According to Gaelic Irish tradition, the O'Donnellys were part of the Cenél nEoghain making them kin of the O'Neills.

He demolished the castle; and he made a prisoner of the son of O'Neill, who was foster-son of O'Donnelly, and carried him off, together with the horses and the other spoils of the town.” At the start of the Plantation of Ulster, Ballydonnelly was allocated as a 'Servitor' portion and as such was granted to Sir Toby Caulfeild who had served in the Crown forces during the 'Nine Years War'.

This manor house, called Castle Caulfield, was badly damaged by fire during the 1641 rebellion and was only reused in a limited capacity thereafter by the descendants of the Caulfeild family.