Joseph Henry Petty (August 20, 1826 New York City – February 9, 1901 Amityville, Suffolk County, New York) was an American politician from New York.
He was the son of Ezekiel Petty (1789–1853) and Elizabeth Petty (1791–1874). About 1853, he married Catharine Van Buren (ca. 1834–ca. 1919), and they had three children.
He was a member of the New York State Assembly (New York Co., 11th D.) in 1855.
He was a member of the New York State Senate (4th D.) in 1856 and 1857.
He joined the New York Metropolitan Police, and retired as a captain. He was commended for bravery during the New York City draft riots of 1863, and the Orange Riots of 1873.
He was buried at the Oakwood Cemetery in Amityville.