South Dublin (Irish: Átha Cliath Theas)[2] is a county in Ireland, within the province of Leinster and the Eastern and Midland Region.

It is bounded by Dublin City (15 km, 9.3 mi to the northeast), the River Liffey (separating it from Fingal to the north), Dún Laoghaire–Rathdown (to the east), County Kildare (to the west) and its hills adjoin the mountains of County Wicklow to the south.

Much of the county is heavily urbanised but small rural settlements exist in the southern and western parts.

It was altered due to a view that the name Belgard might create associations with areas of modern development in Tallaght that now also uses that name.

[14] South Dublin County Council sends three members to the Eastern and Midland Regional Assembly.

[15] The heraldic crest for South Dublin has the inscription "This We Hold in Trust" in both English and Irish, while incorporating elements relating to the history, geography and present day infrastructure of the area.

[citation needed] The League of Ireland club Shamrock Rovers plays at Tallaght Stadium.