| Henry Markell | |
| State: | New York |
| Term Start: | March 4, 1825 |
| Term End: | March 3, 1829 |
| Predecessor: | John W. Cady |
| Successor: | Benedict Arnold |
| Birth Date: | 7 February 1792 |
| Birth Place: | Palatine, New York, U.S. |
| Death Place: | Palatine, New York, U.S. |
| Father: | Jacob Markell |
| Profession: | Politician, lawyer |
Henry Markell (February 7, 1792 Stone Arabia, Montgomery County, New York – August 30, 1831 Palatine, Montgomery Co., NY) was an American lawyer and politician from New York.
He was the son of Congressman Jacob Markell (1770–1852). He attended the common schools, studied law, was admitted to the bar and practiced.
Markell was elected as an Adams man to the 19th and 20th United States Congresses, holding office from March 4, 1825, to March 3, 1829.
At the time of his death, he practiced at Oppenheim, and was buried at the cemetery in the area which in 1838 was separated from Oppenheim as the Town of St. Johnsville.