Ballymun is an area on Dublin's Northside close to Dublin Airport. It is infamous for the Ballymun flats, which became a symbol of poverty, drugs, alienation from the state and social problems in Ireland since the 1970s. Today it is undergoing a multi-billion euro renewal, with a renovated village centre, surrounded by estates of houses and apartments, with several sub-districts such as Sillogue and Poppintree.

The creation of Ballymun Regeneration Limited as a limited company of Dublin City Council initiated the beginning of the demolition of the Ballymun flats and the emergence of a new town of Ballymun. As of 2008, six of the seven towers as well as three eight-storey blocks and seven four-storey blocks have been demolished, with the residents usually rehoused in new state of the art housing in Ballymun. The new housing is a mixture of public, private, voluntary and co-operative housing. The new town of Ballymun is due to be completed by 2013.

The regeneration project, despite well-publicised questions about accountability and democratic participation, has also delivered many other amenities, including reworked park areas, a major City Council office facility, Health Service facilities, a public leisure centre, student accommodation, a new hotel and renewed shopping areas.

As part of the New Ballymun, a major tree-planting project called Amaptocare has been run, with people sponsoring trees and providing inscription texts which are engraved on plaques near the trees.