南都柏林郡 （County of South Dublin，爱尔兰语：Contae Átha Cliath Theas），是爱尔兰的一郡，历史上属伦斯特省都柏林郡，1994年成立。位于爱尔兰岛东部。面积222.74 km²，2006年人口246,919人。首府达拉克。

South Dublin (Irish:Baile Átha Cliath Theas) is a county in Ireland. It is part of the Dublin Region and is also located in the province of Leinster. It is named after the former county of Dublin. South Dublin County Council is the local authority for the county. In 2011, the population of the county was 265,205 making it the third most populous county in the state.