May 30 – Future President Andrew Jackson fights his second duel, killing Charles Dickinson who had accused Jackson's wife of bigamy; Jackson has a bullet lodged close to his heart.
Parson Weems publishes a 2nd edition of his The Life of George Washington, with curious anecdotes laudable to himself and exemplary to his countrymen, first including the story of the young Washington and the cherry-tree.
^Lewis, Meriwether; Clark, William. Moulton, Gary E. (ed.). "March 23, 1805". Journals of the Lewis & Clark Expedition Online (Nebraska ed.). University of Nebraska-Lincoln. Retrieved October 13, 2022.
^Lewis, Meriwether; Clark, William. Moulton, Gary E. (ed.). "August 14, 1806". Journals of the Lewis & Clark Expedition Online (Nebraska ed.). University of Nebraska-Lincoln. Retrieved October 13, 2022.
Nathaniel Bowditch. Observations on the Total Eclipse of the Sun June 16, 1806, Made at Salem. Memoirs of the American Academy of Arts and Sciences, Vol. 3, No. 1 (1809), pp. 18–22
Simeon De Witt. Observations on the Eclipse of 16 June 1806, Made by Simeon De Witt Esq. of Albany, State of New-York, Addressed to Benjamin Rush M. D. to Be by Him Communicated to the American Philosophical Society. Transactions of the American Philosophical Society, Vol. 6, (1809), pp. 300–302
The Massachusetts Election in 1806. Proceedings of the Massachusetts Historical Society, Second Series, Vol. 20, [Vol. 40 of continuous numbering] (1906–1907), pp. 1–21
Herbert E. Bolton. Papers of Zebulon M. Pike, 1806–1807. The American Historical Review, Vol. 13, No. 4 (July, 1908), pp. 798–827
J. Madison. William and Mary College, July 4, 1806. The William and Mary Quarterly, Second Series, Vol. 3, No. 3 (July, 1923), pp. 201–205
Elizabeth Heyward Jervey. Marriage and Death Notices from the Charleston Courier 1806. The South Carolina Historical and Genealogical Magazine, Vol. 30, No. 2 (April, 1929), pp. 117–124
W. E. Hollon. Zebulon Montgomery Pike's Mississippi Voyage, 1805–1806. The Wisconsin Magazine of History, Vol. 32, No. 4 (June, 1949), pp. 445–455
W. H. G. Armytage. A Sheffield Quaker in Philadelphia 1804–1806. Pennsylvania History, Vol. 17, No. 3 (1950), pp. 192–205
Anthony Steel. Impressment in the Monroe-Pinkney Negotiation, 1806–1807. The American Historical Review, Vol. 57, No. 2 (January, 1952), pp. 352–369
George S. Snyderman. Halliday Jackson's Journal of a Visit Paid to the Indians of New York (1806). Proceedings of the American Philosophical Society, Vol. 101, No. 6, Studies of Historical Documents in the Library of the American Philosophical Society (December 19, 1957), pp. 565–588
John H. Reinoehl. Some Remarks on the American Trade: Jacob Crowninshield to James Madison 1806. The William and Mary Quarterly, Third Series, Vol. 16, No. 1 (January, 1959), pp. 83–118
Ludwell Lee Montague. Cornelia Lee's Wedding. As Reported in a Letter from Ann Calvert Stuart to Mrs. Elizabeth Lee, October 19, 1806. The Virginia Magazine of History and Biography, Vol. 80, No. 4 (October, 1972), pp. 453–460
William G. McLoughlin. Thomas Jefferson and the Beginning of Cherokee Nationalism, 1806 to 1809. The William and Mary Quarterly, Third Series, Vol. 32, No. 4 (October, 1975), pp. 548–580
Robert E. Moody, Leverett Saltonstall. Leverett Saltonstall: A Diary Beginning January AD. 1806. Proceedings of the Massachusetts Historical Society, Third Series, Vol. 89, (1977), pp. 127–177
John M. Bryan. Robert Mills, Benjamin Henry Latrobe, Thomas Jefferson, and the South Carolina Penitentiary Project, 1806–1808. The South Carolina Historical Magazine, Vol. 85, No. 1 (January, 1984), pp. 1–21
Dan L. Flores. The Ecology of the Red River in 1806: Peter Custis and Early Southwestern Natural History. The Southwestern Historical Quarterly, Vol. 88, No. 1 (July, 1984), pp. 1–42
Donald R. Hickey. The Monroe-Pinkney Treaty of 1806: A Reappraisal. The William and Mary Quarterly, Third Series, Vol. 44, No. 1 (January, 1987), pp. 65–88
John Taylor, Wilson Cary Nicholas, David N. Mayer. Of Principles and Men: The Correspondence of John Taylor of Caroline with Wilson Cary Nicholas 1806–1808. The Virginia Magazine of History and Biography, Vol. 96, No. 3, "The Example of Virginia Is a Powerful Thing": The Old Dominion and the Constitution, 1788–1988 (July, 1988), pp. 345–388
James P. Ronda. A Moment in Time: The West: September 1806. Montana: The Magazine of Western History, Vol. 44, No. 4 (Autumn, 1994), pp. 2–15
Dan Flores. A Very Different Story: Exploring the Southwest from Monticello with the Freeman and Custis Expedition of 1806. Montana: The Magazine of Western History, Vol. 50, No. 1 (Spring, 2000), pp. 2–17
Matthew E. Mason. Slavery Overshadowed: Congress Debates Prohibiting the Atlantic Slave Trade to the United States, 1806–1807. Journal of the Early Republic, Vol. 20, No. 1 (Spring, 2000), pp. 59–81