1805 in the United States
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Incumbents
Federal government
- Aaron Burr (DR-New York) (until March 4)
- George Clinton (DR-New York) (starting March 4)
- Chief Justice: John Marshall (Virginia)
- Speaker of the House of Representatives: Nathaniel Macon (DR-North Carolina)
- Congress: 8th (until March 4), 9th (starting March 4)
State governments
Events


- January 11 â Michigan Territory is created.
- February 11 â Jean Baptiste Charbonneau, son of Sacagawea, is born with Meriwether Lewis aiding in the baby's delivery.
- February 15 â Harmony Society formally established in the U.S. at Harmony, Pennsylvania.
- March 1 â Justice Samuel Chase is acquitted of impeachment charges by the U.S. Senate.
- March 3 â Louisiana Territory is created.
- March 4 â Thomas Jefferson is sworn in for a second term as President of the United States, and George Clinton is sworn in as Vice President of the United States.
- April 7 â The Lewis and Clark Expedition departs Fort Mandan, beginning their journey to the Pacific Ocean.[1]
- April 27 â Battle of Derne: United States Marines and Berbers attack the Tripolitan city of Derna (The "Shores of Tripoli").
- June 4 â The First Barbary War ends between Tripoli and the United States of America.
- June 11 â Detroit burns to the ground; most of the city is destroyed.
- June 13 â Lewis and Clark Expedition: Scouting ahead of the expedition, Meriwether Lewis and four companions sight the Great Falls of the Missouri River, confirming they are heading in the right direction.[2]
- June 30 â Michigan Territory is effective.
- July 4 â Louisiana Territory is effective.
- October 18 â Lewis and Clark Expedition: William Clark sights Mount Hood through the fog, some 45 miles (72 km) away.[3]
- November 7 â The Lewis and Clark Expedition arrives at the Pacific Ocean.
Undated
- Boston Gleaning Circle, a female literary organization, is established.[4]
Ongoing
- First Barbary War (1801â1805)
- Lewis and Clark Expedition (1804â1806)
Births
- January 8 â Orson Hyde, religious leader (died 1878)
- February 11 â Jean Baptiste Charbonneau, son of Sacagawea, explorer, guide, fur trapper, trader and military scout (died 1866)
- February 18 â Louis M. Goldsborough, admiral (died 1877)
- March 23 â Sears Cook Walker, mathematician and astronomer (died 1853)
- June 14 â Robert Anderson, United States Army officer during the American Civil War (died 1871 in France)
- June 15 â William B. Ogden, Chicago politician and railroad executive (died 1877)
- July 10 â Jacob M. Howard, U.S. Senator from Michigan from 1862 to 1871 (died 1871)
- September 6 â Horatio Greenough, sculptor (died 1852)
- September 19 â John Stevens Cabot Abbott, historian, pastor and pedagogical writer (died 1877)
- October 9 â William M. Gwin, U.S. Senator from California from 1850 to 1855 and from 1857 to 1861 (died 1885)
- November 28 â John Lloyd Stephens, traveler, diplomat and Mayanist archaeologist (died 1852)
- December 2 â Cicero Price, commodore (died 1888)
- December 10 â William Lloyd Garrison, abolitionist (died 1879)
- December 12 â Henry Wells, businessman, founder of Wells Fargo (died 1878)
- December 23 â Joseph Smith, religious leader, founder of the Church of Jesus Christ of Latter-day Saints (died 1844)
Deaths
- January 7 â Ebenezer Sproat, Continental Army officer, pioneer in the Ohio Country (born 1752)
- January 9 â Noble Wimberly Jones, physician and delegate to the Continental Congress in 1781 and 1782 (born c. 1723)
- February 4 â John Sloss Hobart, jurist and politician (born 1738)
- June 17 â John Ames, captain in the American Revolutionary War (born 1738)
- August 28 â Christopher Gadsden, statesman (born 1724)
- September 27 â William Moultrie, general (born 1730)
- November â Robert Alexander, Maryland politician (born c. 1740)

