Dublin 4, also rendered as D4 and D04, is a historic postal district of Dublin, Ireland including Baggot Street Upper, the southernmost fringes of the Dublin Docklands, and the suburbs of Ballsbridge, Donnybrook, Irishtown, Merrion, Ringsend and Sandymount, on the Southside of Dublin. Most of the area was known as Pembroke Township until 1930 when it was absorbed by the City and County Borough of Dublin.

South Lotts is a small area to the south of the river Liffey in inner-city Dublin 4, one km east of Dublin City Centre, Ireland. It was created following the embankment of the River Liffey in 1711 between the city and Ringsend, thereby reclaiming the marshes as North and South Lotts. It is at the westernmost end of Ringsend, overlapping with the Grand Canal Dock area, but is generally accepted to be within Ringsend.