Joseph Blunt (February 1792, Newburyport, Essex County, Massachusetts – June 16, 1860, New York City) was an American lawyer, author, editor and politician from New York.
He was one of four sons of Edmund March Blunt. In 1802, Edmund M. Blunt published the American Practical Navigator by Nathaniel Bowditch, the man who became the godfather of Joseph's younger brother Nathaniel Bowditch Blunt.
Joseph Blunt first came into notice by writing on the Missouri question in 1820. Soon afterward he wrote an article on the Laibach circular, published in the North American Review, which attracted the attention of politicians. In 1825, he published a Historical Sketch of the Formation of the American Confederacy (8 vol.), and from 1827 to 1835 he edited the American Annual Register. He also published Speeches, Reviews, and Reports (1843) and Merchants' and Shipmasters' Assistant (1829 and 1848).
He was long a leading Whig and protectionist. In 1851, Millard Fillmore appointed him Commissioner to China, but he declined to take office. In September 1855, he was a delegate to the Anti-Nebraska state convention in Syracuse which merged with the Whigs to form the Republican Party in the State of New York.
In 1858, he was appointed by Gov. John A. King New York County District Attorney to fill the vacancy caused by the resignation of Peter B. Sweeny.