Sir John McWhae (22 June 1858 – 17 September 1927) was an Australian politician.
He was born in Ballarat to miner Peter McWhae and Grace Wilson.
McWhae worked as a bank clerk before becoming a sharebroker and a member of the Ballarat Stock Exchange.
From around 1890 he worked on the Melbourne Stock Exchange, and he secured his own fortune speculating on the Kalgoorlie boom in 1899 (after early successes at Broken Hill and a setback at Coolgardie.
In 1921 he resigned from Parliament to accept an appointment as Victorian Agent-General, succeeding Peter McBride.