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

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.

[1] The land area of Cumberland South is 3,263 km2 (1,260 sq mi).

[2] This riding has elected the following members of the Legislative Assembly: