Mihail Gheorghiu Bujor (November 8, 1881 – June 17, 1964) was a Romanian lawyer, journalist and socialist militant. An important figure in the early , he embraced communism during World War I and organised Romanian armed detachments in Odessa in support of the October Revolution, hoping to foment a revolution in his native country. A political prisoner in Romania for much of the interwar period and during World War II, he held several minor political offices after the regime change in the late 1940s.