Ballyda (Irish: Baile Dháith)[1] is a small townland in the civil parish of Danesfort in County Kilkenny, Ireland.

The townland has an area of approximately 1.4 square kilometres (0.5 sq mi),[2] and had a population of 70 people as of the 2011 census.

[3] Evidence of ancient settlement within Ballyda townland includes a number of ring ditch and enclosure sites.

[5] As of the late 20th century, a pattern was still celebrated at this well on 15 August each year, to mark the Feast of the Assumption of Mary.

[7][9][11] The origin of the blood at Lady's Well is given as coming from a priest who was killed there by soldiers while saying mass.