Janet Audrey Semple (born 29 March 1955) is a retired South African politician who served as a Member of the Gauteng Provincial Legislature for the Democratic Alliance (DA) from 2010 to 2019.

She previously represented the DA and Democratic Party (DP) in the National Assembly from 1999 to 2009.

Semple joined the National Assembly in the 1999 general election, representing the DP,[1] and stood successfully for re-election in 2004, ranked fourth on the Gauteng party list of the DA, the DP's successor party.

[3] She was also Chairperson of the Democratic Alliance's Women Network from 2005 to 2009 and the DA's political head in Benoni.

[6] Her predecessor, John Moodey, was elected as her successor at the party's March 2012 conference.