Drumballyhagan and Drumballyhagan Clark (locally [ˌdrӧmˌbaliˈhaɡən], from Irish Droim Bhaile Uí Ágáin 'ridge of O'Hagans townland'[2]) are two townlands lying within the civil parish of Kilcronaghan, County Londonderry, Northern Ireland.

Situated in the north of the parish, the two townlands are separated by the Moyola River, of which the southern portion was held by a person surnamed "Clark".

[3] Together they are bounded by the townlands of; Ballynahone Beg, Bracaghreilly, Drumcrow, Fallagloon, Lisnamuck, Moneyshanere, and Tobermore.

They occupied a castle in the nearby townland of Calmore and the surname was common in the neighbouring parishes of Desertmartin and Ballynascreen.

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