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|Centuries:||16th century – 17th century – 18th century|
|Decades:||1640s 1650s 1660s – 1670s – 1680s 1690s 1700s|
|Years:||1668 1669 1670 – 1671 – 1672 1673 1674|
|1671 by topic:|
|Arts and Science|
|Architecture - Art - Literature - Music - Science|
|Lists of leaders|
|Colonial governors - State leaders|
|Birth and death categories|
|Births - Deaths|
|Establishments and disestablishments categories|
|Establishments - Disestablishments|
|Ab urbe condita||2424|
|English Regnal year||22 Cha. 2 – 23 Cha. 2|
|Chinese calendar||庚戌年 (Metal Dog)
4367 or 4307
— to —
辛亥年 (Metal Pig)
4368 or 4308
|- Vikram Samvat||1727–1728|
|- Shaka Samvat||1593–1594|
|- Kali Yuga||4772–4773|
|Japanese calendar||Kanbun 10
|Julian calendar||Gregorian minus 10 days|
|Minguo calendar||241 before ROC
|Thai solar calendar||2213–2214|
|Wikimedia Commons has media related to 1671.|
1671 (MDCLXXI) was a common year starting on Thursday (dominical letter D) of the Gregorian calendar and a common year starting on Sunday (dominical letter A) of the Julian calendar, the 1671st year of the Common Era (CE) and Anno Domini (AD) designations, the 671st year of the 2nd millennium, the 71st year of the 17th century, and the 2nd year of the 1670s decade. Note that the Julian day for 1671 is 10 calendar days difference, which continued to be used from 1582 until the complete conversion of the Gregorian calendar was entirely done in 1929.
- April – Battle of Saraighat: The Ahom general Lachit Borphukan defeats the Mughal forces on the outskirts of present day Guwahati, of then sovereign Assam.
- April 2 – In Rome, Pope Clement X canonizes Rose of Lima, making her the first Catholic saint of the Americas.
- May 9 – Thomas Blood, disguised as a clergyman, attempts to steal the Crown Jewels of the United Kingdom from the Tower of London. He is immediately caught because he is too drunk to run with the loot. He is later condemned to death and then mysteriously pardoned and exiled by King Charles II.
- June 22 – The Ottoman Empire declares war on Poland.
- December – The first Seventh Day Baptist church in America is founded at Newport, Rhode Island.
- December 30 – The Académie royale d'architecture is founded by Louis XIV of France in Paris, France; the world's first school of architecture.
- January 11 – François-Marie, 1st duc de Broglie, French military leader (d. 1745)
- February 26 – Anthony Ashley-Cooper, 3rd Earl of Shaftesbury, English politician and philosopher (d. 1713)
- March 7 – Rob Roy MacGregor, Scottish folk hero (d. 1734)
- April 6 – Jean-Baptiste Rousseau, French poet (d. 1741)
- April 21 – John Law, Scottish economist (d. 1729)
- May 24 – Gian Gastone de' Medici, Grand Duke of Tuscany (d. 1737)
- June 8 – Tomaso Albinoni, Italian composer (d. 1751)
- June 11 – Colley Cibber, English poet (d. 1757)
- June 21 – Christian Detlev Reventlow, Danish diplomat and military leader, brother-in-law of king Frederick IV of Denmark, (d. 1738)
- July 14 – Jacques d'Allonville, French astronomer and mathematician (d. 1732)
- October 1 – Guido Grandi, Italian mathematician (d. 1742)
- October 11 – King Frederick IV of Denmark (d. 1730)
- date unknown – Giacomo Antonio Fancelli, Italian sculptor (d.1619)
- January 6 – Dubhaltach Mac Fhirbhisigh (b. 1643)
- March 31 – Anne Hyde, wife of the future James II of England (b. 1637)
- April 30
- May 5 – Edward Montagu, 2nd Earl of Manchester, English politician (b. 1602)
- June 25 – Giovanni Battista Riccioli, Italian astronomer (b. 1598)
- July 14 – Méric Casaubon, English classical scholar (b. 1599)
- October 26 – Sir John Gell, 1st Baronet, English politician (b. 1593)
- November 12 – Thomas Fairfax, 3rd Lord Fairfax of Cameron, English Civil War general (b. 1612)
- December 28 – Johann Friedrich Gronovius, German classical scholar (b. 1611)