Dartmouth South is a provincial electoral district in Nova Scotia, Canada, that elects one member of the Nova Scotia House of Assembly.

The riding is currently represented by Claudia Chender of the NDP.

In 2003, the district was renamed Dartmouth South – Portland Valley.

In 2013 following the Nova Scotia Electoral Boundaries Commission review, the district returned to its earlier name of Dartmouth South and lost the area south of Russell Lake and east of Highway 111 to Cole Harbour-Eastern Passage.

[2] The electoral district of Dartmouth South is about 8 km2 (3.1 sq mi) in landmass.