Martin Robert McGregor (22 February 1859 – 17 August 1936) was an Australian politician.
He grew up in Melbourne, and became a public servant with the Chief Secretary's Department.
He served on Narracan Shire Council from 1908 to 1936 and was thrice president (1908–09, 1917–18, 1929–30).
In 1922 he was elected to the Victorian Legislative Council for Gippsland Province as a Nationalist.
McGregor held his seat until his death at Narracan in 1936.