Constantin Bosianu (10 February 1815, Bucharest – 21 March 1882, Bucharest) was a Romanian jurist and politician, honorary member of the Romanian Academy, Prime Minister of Romania from 26 January to 14 June 1865.
He was the first dean of the Bucharest Faculty of Law.
Then, he acts as an MP, and at the same time he is Dean of the Ilfov Bar (1871 - 1873).
By the end of his life, Bosianu served as an acting mayor of Bucharest for two weeks in December 1878, and between May 29 and November 15, 1879, Constantin Bosianu was elected the Chairman of the Senate.