|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.
In 1803, Lewis and Clark named the Dearborn River in west-central Montana after Dearborn. 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.