This article is about the year 1722.
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1722 (MDCCXXII) was a common year starting on Thursday (dominical letter D) of the Gregorian calendar and a common year starting on Monday (dominical letter G) of the Julian calendar, the 1722nd year of the Common Era (CE) and Anno Domini (AD) designations, the 722nd year of the 2nd millennium, the 22nd year of the 18th century, and the 3rd year of the 1720s decade. Note that the Julian day for 1722 is 11 calendar days difference, which continued to be used from 1582 until the complete conversion of the Gregorian calendar was entirely done in 1929.
- The Silence Dogood letters appear, written by Benjamin Franklin.
- Edenton is incorporated as the county seat of Chowan County, North Carolina. The governor and assembly of North Carolina move to Edenton, making it the de facto capital of North Carolina until 1746, when the government is moved to New Bern.
- Peter the Great of Russia creates the Table of Ranks.
- A small group of Bohemian Brethren (the "Hidden Seed") from northern Moravia are allowed to settle in a new village, Herrnhut, on the Berthelsdorf estate of the pietist Count Nicolaus Zinzendorf in Upper Lusatia (Saxony), forming the Herrnhuter Brüdergemeine, seed of the Moravian Church's renewal.
- Foundation of the first public theatre in Denmark, Lille Grønnegade Theatre in Copenhagen.
- Modern music theory finds definition in Jean-Philippe Rameau's Traité de l'harmonie réduite à ses principes naturels ("Treatise on Harmony"), published in Paris.
- Johann Sebastian Bach composes The Well-Tempered Clavier.
- January 3 – Fredrik Hasselqvist, Swedish naturalist (d. 1752)
- January 12 – Nicolas Luckner, Marshal of France (d. 1794)
- January 26 – Alexander Carlyle, Scottish church leader (d. 1805)
- February 19 – Charles-François Tiphaigne de la Roche, French author (d. 1774)
- April 11 – Christopher Smart, English poet (d. 1771)
- April 12 – Pietro Nardini, Italian composer (d. 1793)
- April 22 (bapt.) – Joseph Warton, English poet and critic (d. 1800)
- May 11 – Petrus Camper, Dutch anatomist (d. 1798)
- May 29 – James FitzGerald, 1st Duke of Leinster, Irish politician (d. 1773)
- July 16 – Joseph Wilton, English sculptor (d. 1803)
- August 9 – Prince Augustus William of Prussia (d. 1758)
- August 11 – Richard Brocklesby, English physician (d. 1797)
- September 1 - Karl Gotthelf von Hund, German Freemason (d. 1776)
- September 5 – Frederick Christian, Elector of Saxony (d. 1763)
- September 16 – Gabriel Christie, British general (d. 1799)
- September 22 – John Home, Scottish dramatist (d. 1808)
- September 27 – Samuel Adams, American revolutionary leader (d. 1803)
- October 2 – Leopold Widhalm, Austrian luthier (d. 1776)
- November 5 – William Byron, 5th Baron Byron, English dueler (d. 1798)
- November 19
- November 30 – Théodore Gardelle, Swiss painter and enameler (d. 1761)
- December 30 – Charles Yorke, Lord Chancellor of Great Britain (d. 1770)
- date unknown – Flora MacDonald, Scottish heroine (d. 1790)
- probable – Hyder Ali, Indian general and Sultan of Mysore (d. 1782)
- January 21 – Charles Paulet, 2nd Duke of Bolton, English supporter of William III of England (b. 1661)
- January 29 – Carl Gustav Rehnskiöld, Swedish military leader (b. 1651)
- February 5 – Éléonore Desmier d'Olbreuse, Duchess of Braunschweig-Lüneburg (b. 1639)
- February 10 – Bartholomew Roberts, Welsh pirate (b. 1682)
- March 11 – John Toland, Irish philosopher (b. 1670)
- March 31 – Eberhard von Danckelmann, Prime Minister of Brandenburg-Prussia (b. 1643)
- April 13 – Charles Leslie, Irish Anglican theologian (b. 1650)
- April 21 – Robert Beverley, Jr., historian of Colonial Virginia (b. 1673)
- May 20 – Sébastien Vaillant, French botanist (b. 1669)
- June 5 – Johann Kuhnau, German composer (b. 1660)
- June 16
- September 18 – André Dacier, French classical scholar (b. 1651)
- November 20 – Johann Adam Reincken, German organist (b. 1643)
- December 20 – Kangxi Emperor of China (b. 1654)
- December 23 – Pierre Varignon, French mathematician (b. 1654)