John Henry Hubbard (March 24, 1804 - July 30, 1872) was a U.S. Representative from Connecticut.
Born in Salisbury, Connecticut, Hubbard attended the public schools. He studied law. He was admitted to the bar in 1828 and commenced practice in Lakeville. He served as member of the State senate 1847-1849. He served as prosecuting attorney 1849-1852. He moved to Litchfield in 1855 and continued the practice of law.
Hubbard was elected as a Republican to the Thirty-eighth and Thirty-ninth Congresses (March 4, 1863-March 3, 1867). He was an unsuccessful candidate for renomination in 1866. He resumed the practice of law. He died in Litchfield, Connecticut, on July 30, 1872. He was interred in the East Cemetery.