| State Senate: | Mississippi State |
| District: | Calhoun and Yalobusha Counties |
| Term Start: | January 2, 1854 |
| Term End: | March 1856 |
| Successor: | C. H. Guy (both counties) |
| Predecessor: | G. S. Golliday (Yalobusha only) |
| Party: | Democratic |
Colonel Henry Allen Jr. (1823/24 - March 1856) was an American Democratic politician. He represented Calhoun and Yalobusha Counties in the Mississippi State Senate from 1854 to 1856.
Henry Allen Jr. lived in Yalobusha County, Mississippi.[1] In October 1850, a 25-year-old man enslaved by Allen or his family, named Sherrod, was being confined in Holly Springs, Mississippi.[2] On December 13, 1851, Allen attended a meeting in Coffeeville, Mississippi, that considered expanding the New Orleans and Jackson Railroad northwards towards Holly Springs, Mississippi, and then to Tennessee.[3] In 1853, Allen was elected to represent Calhoun and Yalobusha Counties in the Mississippi State Senate, and served in the 1854 and 1856 sessions.[4] [5] At the age of 30, Allen was the youngest member of the senate.[6] In January 1854, he was the Secretary of a convention held to pay respects to Mississippi Governor Henry S. Foote. Allen died in March 1856, and the Legislature paid him tribute.[7] He was survived by his widow and his parents. In November 1856, the Democratic Party nominated Major C. H. Guy to replace Allen in the Senate.[8]