Ballytrustan is a civil parish and townland (of 222 acres) in County Down, Northern Ireland. It is situated in the historic barony of Ards Upper.

Townlands Ballytrustan civil parish contains the following townlands:

Ballybranigan Ballyfounder Ballymacnamee Ballynichol Ballytrustan Ballywierd Corrogs Kearny Parson Hall

See also List of civil parishes of County Down

References