Dublin Bus, which is a wholly owned subsidiary of the state-owned Córas Iompar Eireann Group, operates the Public Service Obligation network in the Dublin Area. It covers a region from Newcastle in County Wicklow to the south, Balbriggan in north County Dublin and Maynooth in County Kildare to the west.

Carrying 118 million customers a year, Dublin Bus provides an extensive range of bus services – Cross City, Radial, Orbital, DART Feeder, Airlink, express limited stop commuter services, Nitelink, and Sightseeing tours.

Dublin Bus employs 3,238 full time members of staff and has a fleet of over 900 buses which are all is low-floor wheelchair accessible.