|5th United States Secretary of War|
March 5, 1801 – March 4, 1809
|Preceded by||Samuel Dexter|
|Succeeded by||William Eustis|
|Born||February 23, 1751
North Hampton, New Hampshire
|Died||June 6, 1829
He represented this district as a Democratic-Republican in the Third and Fourth Congresses (1793-1797). In 1801, President Thomas Jefferson appointed him Secretary of War, a post he held for eight years until March 7, 1809.
Lewis and Clark, appointed by Thomas Jefferson, named the Dearborn River in west-central Montana after Dearborn in 1803. Dearborn County, Indiana, Dearborn, Michigan and Dearborn, Missouri were also named for him, as was Fort Dearborn in Chicago, Illinois.
His son, Henry A. S. Dearborn, was a Congressman in 1831-1833.