Prince Mihail G. Cantacuzino (6 April 1867 – 28 August 1928) was a Romanian politician.

After receiving doctorates in Law and Literature from the University of Paris, he became a prominent member of the Conservative Party.

He served as Mayor of Bucharest from 1904 to 1907 and was elected to the Chamber of Deputies for Ialomița County in 1909.

[1] In 1922, together with other members of the late Take Ionescu's Conservative-Democratic Party, he joined the Romanian National Party, becoming its vice president for the former Old Kingdom.

He was a notorious womanizer and the marriage was an unhappy one, but it did allow the vain Maruca to use the title of "Princess Cantacuzino", which she retained until her death in 1969.