Crumlin covers the area from the River Poddle near the KCR (Kimmage Cross Roads) to Sundrive Road and Crumlin Cross at The Submarine Bar to Crumlin's village core and the Drimnagh Road, to Bunting Road, Crumlin Road then along the Grand Canal from Rialto Bridge to Sally's Bridge. It is situated near to the city centre, on the Southside of Dublin city. Neighbouring areas include Walkinstown, Perrystown, Drimnagh, Terenure, and Kimmage. Crumlin is contained within postal district Dublin 12.