James C. Auchincloss (January 19, 1885 in New York City - October 2, 1976 in Alexandria, Virginia) was an American business and political figure, serving in the U.S. House of Representatives (1943-1965) as a Republican from the State of New Jersey.
Auchincloss attended the Cutler School, New York City, and Groton School, Groton, Mass.; was graduated from Yale University in 1908; engaged in financial and stock brokerage business in New York City 1908-1940; a governor of the New York Stock Exchange, 1921-1938; served in the Seventh Regiment, New York National Guard, 1909-1913; during World War I served as captain, Military Intelligence; deputy police commissioner of New York City; founder, treasurer, president, and chairman of the board of the New York Better Business Bureau; member of the borough council, Rumson, New Jersey, 1930-1937; mayor of Rumson, N.J., 1938-1943.
He was elected as a Republican to the Seventy-eighth and to the ten succeeding Congresses (January 3, 1943-January 3, 1965); was not a candidate for reelection in 1964 to the Eighty-ninth Congress.
He died in Alexandria, Virginia, October 2, 1976; interment in Woodlawn Cemetery, Bronx, N.Y.
Preceded by: William Halstead Sutphin U.S. House of Representatives, New Jersey 3rd District 1943-1965 Succeeded by: James J. Howard