The Territory of Minnesota is created.

The Territory of Minnesota was an organized incorporated territory of the United States that existed from March 3, 1849, until May 11, 1858, when the eastern portion of the territory was admitted to the Union as the state of Minnesota and the western portion became unorganized territory and shortly after was reorganized as part of the Dakota Territory.

March 3 is the 62nd day of the year in the Gregorian calendar; 303 days remain until the end of the year.