The Dublin Area Rapid Transit system is an electrified commuter rail railway network serving the coastline and city of Dublin, Ireland. The service makes up the core of Dublin's suburban railway network, stretching from Greystones, County Wicklow, in the south to Howth and Malahide in north County Dublin. The DART serves 31 stations and consists of 53 route kilometres of electrified railway, and carries in the region of 20 million passengers per year. In a similar manner to the Berlin S-Bahn, the DART blends elements of a commuter rail service and a rapid transit system.

The Dublin Suburban Rail network, branded as Commuter, is a railway network that serves the city of Dublin, Ireland, most of the Greater Dublin Area and outlying towns. The system is made up of five lines:Northern Commuter - Dublin Pearse to Dundalk every weekday. South Eastern Commuter - Dublin Connolly to Gorey. South Western Commuter - Dublin Heuston to Portlaoise/Newbridge. Grand Canal Dock to Hazelhatch and Celbridge/Newbridge via the Phoenix Park Tunnel. Western Commuter - Dublin Pearse / Docklands to Longford/M3 Parkway.