| State 1 | Illinois |
|---|---|
| Term start 1 | February 5, 1847 |
| Term end 1 | March 3, 1847 |
| Preceded 1 | Edward D. Baker |
| Succeeded 1 | Abraham Lincoln |
| Office 3 | Member of the Illinois House of Representatives |
| Term 3 | 1832-1840 |
| Office 2 | Member of the Illinois Senate |
| Term 2 | 1840-1847 |
| Birth date | November 1, 1800 |
| Birth place | Stanford, Kentucky, U.S. |
| Death date | April 28, 1882 (aged 81) |
| Death place | St. Louis, Missouri, U.S. |
| Resting place | Bellefontaine Cemetery, St. Louis, Missouri, U.S. |
| Party | Whig |
| Occupation | Congressman, Superintendent of Illinois state asylum |
| Profession | Politician |
| Allegiance | United States |
| Branch | United States Army |
| Service years | 1832 August 25, 1862 - April 30, 1863 |
| Rank | Private |
| Unit | Illinois Volunteer Regiment Quartermaster’s Department, Jackson, Tennennessee |
John Henry (November 1, 1800 – April 28, 1882) was a U.S. Representative from Illinois.
Born near Stanford, Kentucky, Henry attended the public schools. He served as a private in Captain Arnett's company of Illinois volunteers in the Black Hawk War. He served as a member of the State House of Representatives 1832–1840. He was prominently associated with the first railway being constructed in Illinois in 1838. He served as a member of the State Senate from 1840 to 1847. Following this, he served as the superintendent for the Illinois state insane asylum located in Jacksonville, Illinois.
Henry was elected as a Whig to the Twenty-ninth Congress to fill the vacancy caused by the resignation of Edward D. Baker and served from February 5, 1847, to March 3, 1847. He was succeeded as Congressman by future president of the United States Abraham Lincoln. He was not a candidate for the Thirtieth Congress. He was superintendent of the state insane asylum at Jacksonville, Illinois from 1850 to 1855. During the Civil War, he was connected with the Quartermaster's Department at Jackson, Tennessee, from August 25, 1862, to April 30, 1863. He died on April 28, 1882, in St. Louis, Missouri, and was interred at Bellefontaine Cemetery.