Hon. Hamilton Fish, eldest son of Colonel Nicholas and Elizabeth (Stuyvesant) Fish, was born August 3, 1808, in New York, and graduated from Columbia College in 1827. He was admitted to the bar in 1830, but early turned his attention to political affairs. He became prominent in the Whig party. In 1842 he was elected to the National Congress from the Sixth New York District. In 1846 he was the nominee of his party for the office of lieutenant-governor, with the Hon. John Young as candidate for governor. Although the head of the ticket was elected, the opposition of the anti-renters, whose plans Mr. Fish emphatically condemned, prevented his election. His successful competitor, Addison Gardner, soon resigned the office to accept the position of judge of the Court of Appeals, and Mr. Fish was elected in 1847 in his place. In 1848 Mr. Fish was elected governor of the State by a plurality of nearly 100,000, and in 1851 was chosen United States Senator and served for six years, following which he made an extended tour of Europe. While he was in the Senate, the Republican party was organized, and Governor Fish, as he was always called, became one of its loyal supporters. On the outbreak of the Civil War he took a decided stand in defense of the Union and attained a commanding influence. In 1862 President Lincoln appointed him a member of the Commission to visit the Union prisoners confined in Richmond, with a view to obtaining an exchange, which was eventually effected. He was also chairman of the Union Defense Committee. In 1869 he was called to the cabinet of President Grant, holding the high position of Secretary of State for eight years. Through his skillful and untiring efforts a peace settlement of the Alabama claims was made, through the Treaty of Washington in 1871 and the subsequent Geneva Arbitration in 1872. He became president general of the Order of the Cincinnati in 1854, and so continued until his death. He was also president of the New York Historical Society, of the Union League Club, and of the United Railroad and Canal Company of New Jersey, and from 1859 until 1893 chairman of the board of trustees of Columbia College. Governor Fish served repeatedly as a delegate from the Diocese of New York to the Triennial Conventions of the Protestant Episcopal Church and devoted much of his time to the study of and became an authority in respect of the canon law of the church. After a long, extremely active, and useful life, Mr. Fish passed away at the age of eighty-five years, on September 7, 1893, at his country seat, "Glenclyffe," near Garrison, in Putnam County, New York, leaving behind him the memory of a patriotic citizen and an upright, able and honorable man. Mr. Fish built and for more than forty years lived in a house at the corner of Second Avenue and Seventeenth Street, fronting on Stuyvesant Square, the land occupied by which public park had been given to the city by his uncle, Mr. Peter G. Stuyvesant. The site of Mr. Fish's house and garden is now that of the Maternity Hospital. His country seat, "Glenclyffe," embraced the famous "Beverley House," which had been the headquarters of General Benedict Arnold at the time of the detection of his treason and from which he had fled to the British.
Hamilton Fish married, December 17, 1836, Julia Ursin Niemcewicz Kean, daughter of Peter Philip James Kean, of Ursino, near Elizabeth, New Jersey.
Children of Hamilton Fish and Julia Kean, his wife, were:
1. Sarah Morris, born February 25, 1838; married Sidney Webster, June 7, 1860. He died May 29, 1910. She died February 16, 1923.
2. Elizabeth Stuyvesant, born March 11, 1839; married Frederic Sears Grand d'Hauteville, June 4, 1863. She died March 1st, 1864.
3. Julia Kean, born May 2, 1841; married on Dec. 8, 1868 to Col. Samuel Nicoll Benjamin. He died May 15, 1886. She died Dec. 5, 1908.
4. Susan Le Roy, born Aug. 31, 1844. She married Wm. Evans Rogers, Feb. 13, 1868. She died Jan. 26, 1909. He died March 10, 1913.
5. Nicholas, born Feb. 19, 1846; married Clemence S. Bryce, Sept. 7, 1869. He died Sept. 16, 1902.
6. Hamilton, born April 17, 1849; married 1st Emily Mann, Apr. 28, 1880. She died March 15, 1899. He married second Florence Delaplaine (Beekman) (Amsinck). She died Oct. 22, 1926.
7. Stuyvesant, born June 24, 1851; married Marian Graves Anthon, June 1st, 1876. She died May 25, 1915. He died April 10, 1923.
8. Edith Livingston, born April 30, 1856; married Hugh Oliver Northcote, June 6, 1883. She died Dec. 19, 1887. He died March 30, 1900.
—Stuyvesant Fish, Ancestors of Hamilton Fish and Julia Ursin Niemcewicz Kean, His Wife, pp. 48–50.