Martin John Kennedy (August 29, 1892 – October 27, 1955) was an American politician from New York.
Kennedy was born in New York City on August 29, 1892. He attended the public schools, and graduated from Columbia University in 1909; and from the College of the City of New York in 1914. Then he engaged in the real estate and insurance business, and entered politics.
He served in the United States Army Intelligence during World War I; and was Chairman of the New York City School Board from 1918 to 1924.
He was a member of the New York State Senate (18th D.) from 1924 to 1930, sitting in the 147th, 148th, 149th, 150th, 151st, 152nd and 153rd New York State Legislatures.
Kennedy was elected as a Democrat to the 71st United States Congress to fill the vacancy caused by the resignation of John F. Carew, and was re-elected to the seven succeeding Congresses, holding office from April 11, 1930, to January 3, 1945. Afterwards he resumed the real estate and insurance business.
He died on October 27, 1955, in New York City; and was buried at the Calvary Cemetery in Queens