The40th congressional district of New York was acongressional district for theUnited States House of Representatives in New York. It was created in 1913 as a result of the1910 census. It was eliminated in 1973 as a result of the1970 redistricting cycle after the1970 United States census. It was last represented byHenry P. Smith III who was redistricted into the36th district.

1953–1973:

All ofNiagara

Parts ofErie

1945–1953:

Parts ofMonroe

1913–1945:

All ofNiagara

Parts ofErie

Representative	Party	Years	Cong ress	Note
District established March 4, 1913
Robert H. Gittins (Niagara Falls)	Democratic	March 4, 1913 – March 3, 1915	63rd	Elected in 1912. Unsuccessful candidate for reelection in 1914.
S. Wallace Dempsey (Lockport)	Republican	March 4, 1915 – March 3, 1931	64th 65th 66th 67th 68th 69th 70th 71st	Elected in 1914. Re-elected in 1916. Re-elected in 1918. Re-elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Unsuccessful candidate for renomination in 1930.
Walter G. Andrews (Buffalo)	Republican	March 4, 1931 – January 3, 1945	72nd 73rd 74th 75th 76th 77th 78th	Elected in 1930. Re-elected in 1932. Re-elected in 1934. Re-elected in 1936. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Redistricted to the42nd district.
George F. Rogers (Rochester)	Democratic	January 3, 1945 – January 3, 1947	79th	Elected in 1944. Unsuccessful candidate for reelection.
Kenneth B. Keating (Rochester)	Republican	January 3, 1947 – January 3, 1953	80th 81st 82nd	Elected in 1946. Re-elected in 1948. Re-elected in 1950. Redistricted to the38th district.
William E. Miller (Olcott)	Republican	January 3, 1953 – January 3, 1965	83rd 84th 85th 86th 87th 88th	Redistricted from the42nd district andre-elected in 1952. Re-elected in 1954. Re-elected in 1956. Re-elected in 1958. Re-elected in 1960. Re-elected in 1962. Retired torun for U.S. Vice President. [data missing]
Henry P. Smith III (North Tonawanda)	Republican	January 3, 1965 – January 3, 1973	89th 90th 91st 92nd	Elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Redistricted to the36th district.
District dissolved January 3, 1973

The following chart shows historic election results.Bold type indicates victor.Italic type indicates incumbent.

• Martis, Kenneth C. (1989).The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
• Martis, Kenneth C. (1982).The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
• Congressional Biographical Directory of the United States 1774–presentArchived April 23, 2010, at theWayback Machine
• Election Statistics 1920–presentClerk of the House of Representatives

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