Henry James Sedgwick (June 5, 1812 – June 14, 1868) was an American lawyer and politician who served as a member of the New York State Senate for the 7th district from 1845 to 1847.
He was the son of Stephen Sedgwick (1783–1830), a lawyer who practiced for a short time in Ithaca, and Anna (Baldwin) Sedgwick (1786–1872).
They divorced in 1818, and Anna married Daniel Gott (1794–1864), who was a Congressman from 1847 to 1851.
Sedgwick was a member of the New York State Senate for the 7th district from 1845 to 1847, sitting in the 68th, 69th and 70th New York State Legislatures.
In 1834, Henry J. Sedgwick married Lucinda Snow (d. 1855), and they had three children.