The third season of Madam Secretary, an American political drama television series, originally aired on CBS from October 2, 2016, through May 21, 2017.

Madam Secretary was renewed for a third season on March 25, 2016.

The series follows Elizabeth McCord (Téa Leoni), the United States Secretary of State who, alongside President Conrad Dalton (Keith Carradine) and a dedicated staff led by Nadine Tolliver (Bebe Neuwirth), is instrumental in the shaping of a U.S. foreign policy.

McCord is married to Henry (Tim Daly), a religious scholar and NSA handler.

Madam Secretary was renewed for a third season on March 25, 2016.