George Newell Southwick (March 7, 1863 – October 17, 1912) was a U.S. Representative from New York.
Born in Albany, New York, Southwick attended private and public schools. He graduated from Albany High School in 1879 and from Williams College, Williamstown, Massachusetts, in 1884. He attended the Albany Law School. He began work for the Albany Morning Express in 1885. He worked as an official reporter of the legislature for the Associated Press 1886-1888. In 1888 he became managing editor of the Morning Express and in 1889 of the Albany Evening Journal. He served as chairman of the Republican State convention in 1896.
Southwick was elected as a Republican to the Fifty-fourth and Fifty-fifth Congresses (March 4, 1895 – March 3, 1899). He was an unsuccessful candidate for reelection in 1898 to the Fifty-sixth Congress.
Southwick was elected to the Fifty-seventh and to the four succeeding Congresses (March 4, 1901 – March 3, 1911). He served as chairman of the Committee on Education (Fifty-eighth through Sixtieth Congresses). He was not a candidate for renomination in 1910.
Southwick died in Albany, New York, October 17, 1912; and was buried at the Albany Rural Cemetery in Menands.
State Senator Ralph W. Thomas (1862–1920) was his brother-in-law.