← 1797 1796 1795 1798 in the United States → 1799 1800 1801
Decades:	1770s 1780s 1790s 1800s 1810s
See also:	History of the United States (1789–1849) Timeline of United States history (1790–1819) List of years in the United States

Events from the year 1798 in the United States.

• President: John Adams (F-Massachusetts)
• Vice President: Thomas Jefferson (DR-Virginia)
• Chief Justice: Oliver Ellsworth (Connecticut)
• Speaker of the House of Representatives: Jonathan Dayton (F-New Jersey)
• Congress: 5th

• January – Eli Whitney contracts with the U.S. federal government for 10,000 rifles, which he will produce with interchangeable parts.
• January 8 – 11th Amendment ratified after two states are ratified.
• February 17 – Federalist Congressman Roger Griswold of Connecticut attacks Vermont Representative Matthew Lyon with a walking stick in the chambers of the United States House of Representatives.
• March – The XYZ Affair begins, souring relations between the United States and France.
• April – U.S. House of Representatives elections begin in New York and continue into 1799.
• April 7 – The Mississippi Territory is organized from territory ceded by Georgia and South Carolina and is later twice expanded to include disputed territory claimed by both the U.S. and Spain.
• July 7
  • Quasi-War: The United States Congress rescinds treaties with France, sparking the war.
  • In the action of USS Delaware vs La Croyable, the newly formed United States Navy makes its first capture.
• July 9 – Quasi-War: The Act Further to Protect the Commerce of the United States is approved by Congress, authorizing the President to use military force against France.
• July 11 – The United States Marine Corps is established by Congress (the Marine Corps had existed prior, see history of the United States Marine Corps).
• July 14 – The Alien and Sedition Acts become United States law, making it a federal crime to write, publish, or utter false or malicious statements about the United States government.
• July 16 – The Relief of Sick and Disabled Seamen Act is signed into law, creating the Marine Hospital Service, the forerunner to the current United States Public Health Service Commissioned Corps.
• September – Charles Brockden Brown publishes the first significant American novel, the Gothic fiction Wieland: or, The Transformation; an American Tale.
• October 2 – The Treaty of Tellico is signed between the United States and the Cherokee Nation.
• November 16 – The Kentucky state legislature passes the first of the Kentucky and Virginia Resolutions, authored by Thomas Jefferson.
• December 24 – The Virginia state legislature passes the second of the Kentucky and Virginia Resolutions, authored by James Madison.

• Quasi-War (1798–1800)
• XYZ Affair (1797–1798)

• January 4 – William Crosby Dawson, United States Senator from Georgia from 1849 till 1855. (died 1856)
• January 5 – James Semple, United States Senator from Illinois from 1843 till 1847. (died 1866)
• January 18 – Augustus Seymour Porter, United States Senator from Michigan from 1840 till 1845. (died 1872)
• February 20 – Richard M. Young, United States Senator from Illinois from 1837 till 1843. (died 1861)
• March 4 – John Joseph Abercrombie, Union Army brigadier general (died 1877)
• March 13 – Abigail Fillmore, wife of Millard Fillmore, First Lady of the United States, Second Lady of the United States (died 1853)
• June 12 – Samuel Cooper, United States Army officer during the Second Seminole War and the Mexican–American War, highest-ranking Confederate general during the American Civil War (died 1876)
• June 25 – Sophia Dallas, wife of George M. Dallas, Second Lady of the United States (died 1869)
• December 3 – Alfred Iverson, Sr., United States Senator from Georgia from 1855 till 1861. (died 1873)

• March 22 – Justin Morgan, horse breeder and composer (born 1747)
• June 20 – Jeremy Belknap, historian of New Hampshire (born 1744)
• August 18 – John Lewis Gervais, Revolutionary, member of Provincial Congress 1775, State's Committee of Safety from 1775 to 1781, South Carolina's Senate in 1781 and 1782, Continental Congress 1782 and 1783 (born 1741)
• August 21 – James Wilson, politician (born 1742)
• September 10 – Benjamin Franklin Bache, journalist (born 1769)
• September 21 – George Read, lawyer and signatory of the Declaration of Independence (born 1733)

• Timeline of United States history (1790–1819)

• Higginson, T. W. (1885). "American Flash Language in 1798". Science. 5 (118): 380–382. doi:10.1126/science.ns-5.118.380. PMID 17840423.
• Carlos E. Godfrey. Organization of the Provisional Army of the United States in the Anticipated War with France, 1798–1800. The Pennsylvania Magazine of History and Biography, Vol. 38, No. 2 (1914), pp. 129–132
• Letters from William and Mary College, 1798–1801. The Virginia Magazine of History and Biography, Vol. 29, No. 2 (April 1921), pp. 129–179.
• Yellow Fever in Boston, 1798. Proceedings of the Massachusetts Historical Society, Third Series, Vol. 59, (October 1925 – June 1926).
• Kyte, George W. (1948). "Guns for Charleston: A Case of Lend-Lease in 1798-1799". The Journal of Southern History. 14 (3): 401–408. doi:10.2307/2197882. JSTOR 2197882.
• Menk, Patricia Holbert (1949). "D. M. Erskine: Letters from America, 1798-1799". The William and Mary Quarterly. 6 (2): 251–284. doi:10.2307/1919872. JSTOR 1919872.
• Tolles, Frederick B. (1950). "Unofficial Ambassador: George Logan's Mission to France, 1798". The William and Mary Quarterly. 7 (1): 3. doi:10.2307/1922933. JSTOR 1922933.
• Peterson, Charles E. (1952). "Fish Oil for Roofs, 1798". Journal of the Society of Architectural Historians. 11 (4): 34–35. doi:10.2307/987588. JSTOR 987588.
• William G. Soler. A Reattribution: John Dickinson's Authorship of the Pamphlet "A Caution," 1798. The Pennsylvania Magazine of History and Biography, Vol. 77, No.1 (January 1953), pp. 24–31.
• Smith, James Morton (1954). "The Enforcement of the Alien Friends Act of 1798". The Mississippi Valley Historical Review. 41 (1): 85–104. doi:10.2307/1898151. JSTOR 1898151.
• Smith, James Morton (1954). "Background for Repression: America's Half-War with France and the Internal Security Legislation of 1798". Huntington Library Quarterly. 18 (1): 37–58. doi:10.2307/3816242. JSTOR 3816242.
• Smith, James Morton (1955). "The Federalist "Saints" versus "The Devil of Sedition": The Liberty Pole Cases of Dedham, Massachusetts, 1798-1799". The New England Quarterly. 28 (2): 198–215. doi:10.2307/362780. JSTOR 362780.
• Nelson, Lee H. (1959). "Brickmaking in Baltimore, 1798". Journal of the Society of Architectural Historians. 18 (1): 33–34. doi:10.2307/987894. JSTOR 987894.
• "Latrobe on Architects' Fees, 1798". Journal of the Society of Architectural Historians. 19 (3): 115–117. 1960. doi:10.2307/988026. JSTOR 988026.
• Budka, Metchie J. E.; Niemcewicz, Julian Ursyn (1961). "A Visit to Harvard College: 1798. From the Diary of Julian Ursyn Niemcewicz". The New England Quarterly. 34 (4): 510. doi:10.2307/363530. JSTOR 363530.
• Allen, Carlos R. (1963). "David Barrow's Circular Letter of 1798". The William and Mary Quarterly. 20 (3): 440–451. doi:10.2307/1918956. JSTOR 1918956.
• Peter J. Parker. Asbury Dickins, Bookseller, 1798–1801, or, the Brief Career of a Careless Youth. The Pennsylvania Magazine of History and Biography, Vol. 94, No. 4 (October 1970), pp. 464–483.
• Steven H. Hochman. On the Liberty of the Press in Virginia: From Essay to Bludgeon, 1798–1803. The Virginia Magazine of History and Biography, Vol. 84, No. 4 (October 1976), pp. 431–445
• Lee W. Formwalt. An English Immigrant Views American Society: Benjamin Henry Latrobe's Virginia Years, 1796–1798. The Virginia Magazine of History and Biography, Vol. 85, No. 4 (October 1977), pp. 387–410.
• Murphy, William J. (1979). "John Adams: The Politics of the Additional Army, 1798-1800". The New England Quarterly. 52 (2): 234–249. doi:10.2307/364841. JSTOR 364841.
• Marini, Alfred J. (1980). "Political Perceptions of the Marine Forces: Great Britain, 1699, 1739 and the United States 1798, 1804". Military Affairs. 44 (4): 171–176. doi:10.2307/1987283. JSTOR 1987283.
• Lee Soltow. Housing characteristics on the Pennsylvania frontier: Mifflin County dwelling values in 1798. Pennsylvania History, Vol. 47, No. 1 (January 1980), pp. 57–70
• Gough, Robert (1986). "Officering the American Army, 1798". The William and Mary Quarterly. 43 (3): 460–471. doi:10.2307/1922485. JSTOR 1922485.
• Soltow, Lee (1987). "The Distribution of Income in the United States in 1798: Estimates Based on the Federal Housing Inventory". The Review of Economics and Statistics. 69 (1): 181–185. doi:10.2307/1937921. JSTOR 1937921.
• Ray, Thomas M. (1983). ""Not One Cent for Tribute": The Public Addresses and American Popular Reaction to the XYZ Affair, 1798-1799". Journal of the Early Republic. 3 (4): 389–412. doi:10.2307/3122881. JSTOR 3122881.
• Soltow, Lee (1984). "Wealth Inequality in the United States in 1798 and 1860". The Review of Economics and Statistics. 66 (3): 444–451. doi:10.2307/1925000. JSTOR 1925000.
• Paul Douglas Newman. Fries's Rebellion and American Political Culture, 1798–1800. The Pennsylvania Magazine of History and Biography, Vol. 119, No. 1/2 (January–April 1995), pp. 37–73
• Anita DeClue, Billy G. Smith. Wrestling the "Pale Faced Messenger": The Diary of Edward Garrigues During the 1798 Philadelphia Yellow Fever Epidemic. Pennsylvania History, Vol. 65, Explorations in Early American Culture (1998), pp. 243–268
• Robert H. Churchill. Popular Nullification, Fries' Rebellion, and the Waning of Radical Republicanism, 1798–1801. Pennsylvania History, Vol. 67, No. 1, Fries' Rebellion (Winter 2000), pp. 105–140
• Dimmig, Jeffrey S. (2001). "Palatine Liberty: Pennsylvania German Opposition to the Direct Tax of 1798". The American Journal of Legal History. 45 (4): 371–390. doi:10.2307/3185312. JSTOR 3185312.

• Media related to 1798 in the United States at Wikimedia Commons