Ballycullen is a townland and suburb of Dublin, Ireland. Ballycullen townland, which has an area of approximately 0.45 km2 (0.17 sq mi), is in the civil parish of Tallaght. Situated within the electoral division of Firhouse-Ballycullen, the townland had a population of 2,226 people as of the 2011 census. The Ballycullen Road area is served by Dublin Bus routes 15, 49 and 65b.