Cumberland South is a provincial electoral district in Cumberland County, Nova Scotia, Canada, that elects one member of the Nova Scotia House of Assembly. The riding was created before the 1993 election from most of Cumberland West and Cumberland Centre ridings and a small part of Cumberland East.
The communities of Oxford, Parrsboro and Springhill are within its boundaries.
The Member of the Legislative Assembly since 1998 has been held by the Progressive Conservative Party of Nova Scotia. A Tory stronghold, Cumberland South has been dominated by Progressive Conservative Murray Scott for over a decade and now Tory Rushton
The 2012 redistribution saw the riding gain territory from Cumberland North.
The land area of Cumberland South is .
This riding has elected the following members of the Legislative Assembly: