Joseph Costello is an Irish former Labour Party politician who was a member of Dublin City Council from 2019 to 2023. He served as a Minister of State from 2011 to 2014. He was a Teachta Dála (TD) for the Dublin Central constituency from 1992 to 1997 and 2000 to 2016.

Dublin City Council is the local authority of the city of Dublin in Ireland. As a city council, it is governed by the Local Government Act 2001. Until 2001, the authority was known as Dublin Corporation. The council is responsible for public housing and community, roads and transportation, urban planning and development, amenity and culture and environment. The council has 63 elected members and is the largest local council in Ireland. Elections are held every five years and are by single transferable vote. The head of the council has the honorific title of Lord Mayor. The city administration is headed by a Chief Executive, Richard Shakespeare. The council meets at City Hall, Dublin.