|Centuries:||17th century – 18th century – 19th century|
|Decades:||1720s 1730s 1740s – 1750s – 1760s 1770s 1780s|
|Years:||1748 1749 1750 – 1751 – 1752 1753 1754|
|1751 by topic:|
|Arts and Sciences|
|Archaeology – Architecture – Art – Literature (Poetry) – Music – Science|
|Canada – Canada –Denmark – France – Great Britain – Ireland – Norway – Russia – Scotland –Sweden –|
|Lists of leaders|
|Colonial governors – State leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||2504|
|British Regnal year||24 Geo. 2 – 25 Geo. 2|
|Chinese calendar||庚午年 (Metal Horse)
4447 or 4387
— to —
辛未年 (Metal Goat)
4448 or 4388
|- Vikram Samvat||1807–1808|
|- Shaka Samvat||1673–1674|
|- Kali Yuga||4852–4853|
|Japanese calendar||Kan'en 4 / Hōreki 1
|Julian calendar||Gregorian minus 11 days|
|Minguo calendar||161 before ROC
|Thai solar calendar||2293–2294|
|Wikimedia Commons has media related to 1751.|
1751 (MDCCLI) was a common year starting on Friday (dominical letter C) of the Gregorian calendar and a common year starting on Tuesday (dominical letter F) of the Julian calendar, the 1751st year of the Common Era (CE) and Anno Domini (AD) designations, the 751st year of the 2nd millennium, the 51st year of the 18th century, and the 2nd year of the 1750s decade. Note that the Julian day for 1751 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. In Britain and its colonies, 1751 only had 282 days due to the Calendar Act of 1750.
- March 25
- March 31 – Frederick, Prince of Wales dies in London and is succeeded by his son, the future George III of the United Kingdom, as heir-apparent to the British throne and Prince of Wales. His mother Augusta of Saxe-Gotha becomes Dowager Princess of Wales.
- May 11 – The Pennsylvania legislature grants a charter to Benjamin Franklin and Dr. Thomas Bond for the establishment in Philadelphia of the first hospital in the Colonies.
- July 28 – Kingdom of Kartli defeats a large army of Tabriz Khanate under Erekle II in the Battle of Kirkhbulakh
- July 31 – Fire destroys 1,000 houses in Stockholm.
- August 13 – The Academy and College of Philadelphia, predecessor to the private University of Pennsylvania, opens its doors, with Benjamin Franklin as president.
- September 13 – Kalvária Banská Štiavnica in the Kingdom of Hungary is completed.
- October 27 – The Hōreki period begins in Japan.
- December 3 – Battle of Arnee in India (Second Carnatic War): A British East India Company-led force under Robert Clive defeats and routs a much larger Franco-Indian army under the command of Raza Sahib at Arni.
- In the University of Glasgow
- The Encyclopédie is first published.
- Swedish naturalist Carl Linnaeus publishes his Philosophia Botanica, the first textbook of descriptive systematic botanical taxonomy and the first appearance of his binomial nomenclature.
- Maria Theresa thaler minted; it becomes an international currency.
- 1751–1775 – 13% of appointees to audiencias in the Spanish Empire are Creoles.
- January 12 – Ferdinand I of the Two Sicilies (d. 1825)
- February 20 – Johann Heinrich Voss, German poet (d. 1826)
- March 16 – James Madison, 4th President of the United States (d. 1836)
- May 24 – Charles Emmanuel IV of Savoy, King of Sardinia (d. 1819)
- June 4 – John Scott, 1st Earl of Eldon, Lord Chancellor of Great Britain (d. 1838)
- June 17 – Joshua Humphreys, American naval architect (d. 1838)
- July 11 – Caroline Matilda, British princess, queen consort of Denmark (d. 1775)
- July 30 (midnight) – Maria Anna Mozart ("Nannerl"), Austrian pianist, singer, composer and violinist, sister of Wolfgang Amadeus Mozart
- September 1 – Emanuel Schikaneder, German dramatist, actor and singer (d. 1812)
- September 5 – François Joseph Westermann, French Revolutionary leader and general (d. 1794)
- October 30 – Richard Brinsley Sheridan, Irish dramatist and politician (d. 1816)
- date unknown
- January 17 – Tomaso Albinoni, Italian composer (b. 1671)
- January 20 – John Hervey, 1st Earl of Bristol, English politician (b. 1665)
- January 25 – Paul Dudley, Attorney-General of Massachusetts (b. 1675)
- February 5 – Henri François d'Aguesseau, Chancellor of France (b. 1668)
- March 25 – King Frederick I of Sweden (b. 1676)
- March 29 – Thomas Coram, English sea captain and philanthropist (b. c. 1668)
- March 31 – Frederick, Prince of Wales, Hanoverian-born heir to the British throne (b. 1707)
- April 19 – Peter Lacy, Irish-born Russian Field marshal (b. 1678)
- June 9 – John Machin, English mathematician (b. c.1686)
- June 20 – Adriaan Valckenier, Dutch Governor-General of the Dutch East Indies from 1737 to 1741 (b. 1695)
- August 30 – Christopher Polhem, Swedish scientist (b. 1661)
- October 22 – William IV, Prince of Orange, Stadtholder of the Dutch Republic (b. 1711)
- October 26 – Philip Doddridge, English nonconformist religious leader (b. 1702)
- December 12 – Henry St John, 1st Viscount Bolingbroke, English statesman and philosopher (b. 1678)
- December 16 – Leopold II of Anhalt-Dessau, Prussian general (b. 1700)
- December 19 – Louise of Great Britain, queen of Frederick V of Denmark (b. 1724)