|Covid-19|President: James Monroe (DR-Virginia)
Vice President: Daniel D. Tompkins (DR-New York)
Chief Justice: John Marshall (Virginia)
Speaker of the House of Representatives: Philip Pendleton Barbour (DR-Virginia) (until March 4), Henry Clay (DR-Kentucky) (starting December 1)
Congress: 17th (until March 4), 18th (starting March 4)
February 3 – Jackson Male Academy, precursor of Union University, opens in Tennessee.
The Arikara War is fought between the Arikara nation and the United States, the first American military conflict with the Plains Indians.
Hugh Glass is attacked and mauled by a Grizzly bear and left for dead. He crawls 200 miles before reaching help, events depicted in The Revenant (2015 film).
November 15 – Lone Horn succeeds (probably) his father, and becomes chief of the Minneconjou Sioux; he will be chief until his death on October 16, 1875.
December 2 – Monroe Doctrine: US President James Monroe delivers a speech to the U.S. Congress, announcing a new policy of forbidding European interference in the Americas and establishing American neutrality in future European conflicts.
December 23 – A Visit From St. Nicholas, attributed to Clement Clarke Moore, is first published.
United States jurisprudence first affirms the enduring rights of indigenous landholders. (See tribal sovereignty.)
Orford Parish of East Hartford, Connecticut separates and is incorporated as the Town of Manchester by a special act of the Connecticut General Assembly.
Era of Good Feelings (1817–1825)
A. B. plot (1823–1824)
January 28 – Philip Spencer, founder of Chi Psi Fraternity and midshipman aboard the USS Somers (died 1842)
March 23 – Schuyler Colfax, the 17th Vice President of the United States from 1869 till 1873. (died 1885)
July 1 – Charles B. Farwell, United States Senator from Illinois from 1887 till 1891. (died 1903)
July 9 (date uncertain) – Phineas Gage, improbable head injury survivor (died 1860)
July 24 – Arthur I. Boreman, United States Senator from West Virginia from 1869 to 1875. (died 1896)
August 4 – Oliver P. Morton, United States Senator from Indiana from 1867 to 1877. (died 1877)
August 15 – Orris S. Ferry, United States Senator from Connecticut from 1867 till 1875. (died 1875)
September 14 – Benjamin Harvey Hill, United States Senator from Georgia from 1877 till 1882. (died 1882)
November 18 – Charles H. Bell, United States Senator from New Hampshire in 1879. (died 1893)
November 23 – Eliza Hendricks, wife of Thomas A. Hendricks, Second Lady of the United States (died 1903)
January 21 – Gideon Olin, politician (born 1743)
April 23 – John Williams Walker, U.S. Senator from Alabama from 1819 to 1822 (born 1783)
September 28 – Charlotte Melmoth, tragic actress (born 1749 in Great Britain)
October 8 – Martin D. Hardin, U.S. Senator from Kentucky from 1816 to 1817 (born 1780)
1823 in the United States Wikipedia
Events from the year 1823 in the United States.