Public transport operators in Dublin

Many companies operate public transport services in Dublin, most of which are state owned or semi state owned.

Iarnród Éireann, also known as Irish Rail a subsidiary of state owned Córas Iompair Éireann, operates all rail services in Dublin including the DART.

Dublin's Luas light rail system is owned by the state owned Transport Infrastructure Ireland and operated on its behalf by Transdev. It was previously operated by Veolia Transport Ireland (formerly known as Connex). There are currently two Luas tram lines in the city, the Red and Green.

Historically, bus services in Dublin were operated mainly by the Dublin United Transport Company, which was incorporated into CIÉ in 1945. Today, two subsidiary companies of state owned Córas Iompair Éireann operate most of the bus services in and around Dublin but many other private companies also provide services. Most routes are awarded to the state owned firms by non tendered direct award (with the exception of Dublin Bus Airlink and Bus Éireann Expressway services, which are entirely commercial); but recently a portion of both firms routes were offered for public tender. Neither firm retained these routes, with Go Ahead Ireland winning both contracts

Some additional routes are tendered where a need is identified by the National Transport Authority. These are public service obligation routes and occasionally replace sections of withdrawn or altered Bus Éireann Expressway services.

Dublin Bus operates the vast majority of bus services in Dublin, including night services on Fridays and Saturdays and some limited 24h services.

Go Ahead Ireland operate approximately 10% of the total Dublin network, primarily consisting of routes transferred from Dublin Bus after it won a competitive tender process. Go Ahead additionally won the tender for the 197 service from Swords to Ashbourne which began operating on 24 November 2019. This does not operate as part of the Dublin network. JJ Kavanagh & Sons operate the 139 service from Naas to Blanchardstown in Dublin on behalf of the National Transport Authority.

Bus Éireann operates many long distance and express services to/from Dublin.