signed • January 7 – The
Virginia General Assembly adopts the
Report of 1800, a resolution drafted by
James Madison arguing for the
sovereignty of the individual
states under the
United States Constitution and against the
Alien and Sedition Acts. • April – Voting begins in the
1800 United States presidential election; it will last until October. The result is not announced until February 1801. • April 24 – The U.S.
Library of Congress is founded. • May 7 –
Indiana Territory is formed by an Act of Congress as the first new territory created from the lands of the
Northwest Territory. • May 21 – President
John Adams issues general amnesty for the
Pennsylvania Dutch farmers who participated in
Fries's Rebellion. • July 4 –
Indiana Territory is effective. • July 10 –
Connecticut cedes its
Western Reserve (a strip in present-day northeastern
Ohio) to the federal government, which adds it to the
Northwest Territory. • August 4 – The
2nd United States Census is conducted. It finds 5,308,483 people living in the U.S. of which 893,602 are
slaves. • August 30 –
Gabriel Prosser's
slave revolt in
Richmond, Virginia is postponed due to weather. Word of his plan reaches Virginia's governor,
James Monroe, who calls in the state militia. Gabriel is later captured and hanged on October 10 along with 23 other slaves. • September 30 – The
Convention of 1800, or Treaty of Mortefontaine, is signed between
France and the United States of America, ending the
Quasi-War. • October 1 – In the
Third Treaty of San Ildefonso,
Spain returns
Louisiana to
France. • November 1 • U.S. President
John Adams becomes the first
president of the United States to live in the Executive Mansion (later renamed the
White House). •
Middlebury College is granted its charter by the
Vermont General Assembly. • November 17 – The
U.S. Congress holds its first
Washington, D.C. session.
Ongoing •
Quasi-War (1798–1800) •
Presidency of John Adams (March 4, 1797 – March 4, 1801) ==Publications==