Peter Francis Salmon Cook (8 November 1943 – 3 December 2005) was an Australian politician.

He served as a Labor member of the Senate from 1983 to 2005, representing the state of Western Australia.

[2] Cook was born in Melbourne, Victoria, and was an active trade unionist before entering politics.

An avid ally of Julia Gillard, Cook publicly backed her for the Labor leadership after Mark Latham resigned in 2005.

The last Senate report to which he contributed was The cancer journey: Informing choice, handed down on 23 June 2005.