John Albert Tiffin Hull (May 1, 1841 – September 26, 1928) was a ten-term Republican U.S. Representative from Iowa's 7th congressional district. He had earlier served two terms as the Lieutenant Governor of Iowa and three terms as Iowa Secretary of State.
Born in Sabina, Ohio, Hull moved with his parents to Iowa in 1849. He attended public schools, Indiana Asbury (now De Pauw) University in Greencastle, Indiana, and Iowa Wesleyan College in Mount Pleasant, Iowa. He graduated from the Cincinnati Law School in the spring of 1862, was admitted to the bar the same year, and commenced practice in Des Moines, Iowa.
In July 1862, during the Civil War, he enlisted in the Twenty-third Regiment of the Iowa Volunteer Infantry. He was a first lieutenant and captain, resigning due to wounds in October 1863.
Hull engaged in agricultural pursuits and banking.
He was elected Secretary of the Iowa Senate in 1872, then reelected in 1874, 1876, and 1878. He was elected Iowa Secretary of State in 1878 (and reelected in 1880 and 1882). He was then elected Lieutenant Governor in 1885 (and reelected in 1887).
In 1890, Hull was elected as a Republican to the U.S. House seat for Iowa's 7th congressional district, which included Iowa's largest city (Des Moines). The Fifty-second Congress was unusual for its era, because, for the first time since the Civil War, Iowans had elected more Democrats than Republicans to the U.S. House. Two years, later, however, there was a Republican resurgence in Iowa, commencing a two-decade era in which Republicans held at least ten of Iowa's eleven House seats. During that era, Hull was re-elected nine times. He served as chairman of the House Committee on Military Affairs from the Fifty-fourth through Sixty-first Congresses. He was considered a "standpatter," and a lieutenant of controversial House Speaker "Uncle Joe" Cannon.