1727 (MDCCXXVII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1727th year of the Common Era (CE) and Anno Domini (AD) designations, the 727th year of the 2nd millennium, the 27th year of the 18th century, and the 8th year of the 1720s decade. As of the start of 1727, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.
|Ab urbe condita||2480|
|Balinese saka calendar||1648–1649|
|British Regnal year||13 Geo. 1 – 1 Geo. 2|
|Chinese calendar||丙午年 (Fire Horse)|
4423 or 4363
— to —
丁未年 (Fire Goat)
4424 or 4364
|- Vikram Samvat||1783–1784|
|- Shaka Samvat||1648–1649|
|- Kali Yuga||4827–4828|
|Japanese calendar||Kyōhō 12|
|Julian calendar||Gregorian minus 11 days|
|Minguo calendar||185 before ROC|
|Thai solar calendar||2269–2270|
1853 or 1472 or 700
— to —
1854 or 1473 or 701
|Wikimedia Commons has media related to 1727.|
- February 11 – Spain besieges Gibraltar, in order to recapture the territory.
- February 2 – Johann Sebastian Bach's solo cantata, Ich habe genug, BWV 82, premieres in Leipzig.
- February 20 – German composer George Frideric Handel becomes a British subject.
- April 11 – Johann Sebastian Bach's St Matthew Passion (BWV 244b) premieres at St. Thomas Church, Leipzig.
- May 12 – History of the Moravian Church: The 18th century renewal: The Brotherly Agreement is adopted by the Moravian Church community at Herrnhut, under the influence of Count Nicolaus Zinzendorf, beginning the Church's renewal.
- May 31 – The Royal Bank of Scotland is founded by Royal Charter in Edinburgh.
- June 11 – George, Prince of Wales, becomes King George II of Great Britain, on the death of his father.
- June 27 – Uxbridge, Massachusetts, is incorporated as a town.
- July – History of the Ursulines in New Orleans: Seventeen Ursuline Sisters from France land in New Orleans, Louisiana, where they found the orphanage which is the predecessor of Catholic Charities and the Ursuline Academy, making the latter the oldest continuously-operating school for girls, and the oldest Catholic school in the United States.
- August 13 – History of the Moravian Church: The 18th century renewal: The Moravian Church community at Herrnhut undergoes a Pentecostalist experience.
- August 30 – Anne, eldest daughter of King George II of Great Britain, is given the title Princess Royal.
- September 8 – A barn fire during a puppet show in the village of Burwell, Cambridgeshire, England, kills 78 people, many of them children. Another report says that all but six of the 160 persons assembled were killed in the accidental fire.
- October 11 – George II of Great Britain is crowned. Handel's Coronation Anthems are composed for the event, including Zadok the Priest, which has been played at every subsequent Coronation of the British monarch.
- November 18 – An earthquake in Tazriz, Persia kills 77,000.
- November 21 – The Netherlands signs the Treaty of Seville.
- November 27 – The foundation stone of the Jerusalem's Church in Berlin is laid.
- An old woman known as Janet (Jenny) Horne of Loth, Sutherland becomes the last alleged witch in the British Isles to be executed, when she is burned at the stake in Dornoch, Scotland. (Some sources give the date as June 1722.)
- The first Amish move to North America.
- 1727–1800 – Lt. Col. Francisco de Mello Palheta smuggles coffee seeds to Brazil in a bouquet, starting a coffee empire.
- January 2 – James Wolfe, British general (d. 1759)
- January 25 – Aron Gustaf Silfversparre, Swedish baron (d. 1818)
- May 10 – Anne Robert Turgot, French statesman (d. 1781)
- May 14 – Thomas Gainsborough, English artist (d. 1788)
- July 26 – Horatio Gates, retired British soldier who served as an American general during the American Revolutionary War (d. 1806)
- August 14
- August 22 – Johann Joseph Gassner, German priest (d. 1779)
- October 23 – Empress Xiaoyichun of China (d. 1775)
- November 26 – Artemas Ward, American major general (d. 1800)
- December 6 – Johann Gottfried Zinn, German anatomist, botanist (d. 1757)
- December 27 – Arthur Murphy, Irish writer (d. 1805)
- January 17 – Johann Christoph Wichmannshausen, German philosopher (b. 1663)
- January 24 – Magdalena Stenbock, Swedish salon hostess (b. 1649)
- February 6 – Charles Boit, Swedish enameller, miniature painter (b. 1662)
- February 10 – Procopio Cutò, French entrepreneur (b. 1651)
- February 13 – William Wotton, English scholar (b. 1666)
- February 22 – Francesco Gasparini, Italian composer (b. 1661)
- February 23 – Lionel Tollemache, 3rd Earl of Dysart, British politician and nobleman (b. 1649)
- March 31 [O.S. March 20] – Sir Isaac Newton, English scientist (b. 1643)
- April 15 – George Compton, 4th Earl of Northampton (b. 1664)
- May 17 – Empress Catherine I of Russia (b. 1684)
- June 8 – August Hermann Francke, German Protestant minister (b. 1663)
- June 11
- July 9 – Veronica Giuliani, Italian nun, mystic (b. 1660)
- July 23 – Simon Harcourt, 1st Viscount Harcourt, Lord Chancellor of Great Britain (b. c. 1660)
- August 4 – Victor-Maurice, comte de Broglie, French general (b. 1647)
- August 14 – William Croft, English composer (b. 1678)
- August 17 – Louis, Duke of Rohan, French noble (b. 1652)
- August 27 – Aert de Gelder, Dutch painter (b. 1645)
- September 6 – George Hooper, Bishop of St Asaph
Bishop of Bath and Wells (b. 1640)
- September 7 – Glückel of Hameln, German businesswoman and diarist (b. 1647)
- September 8 – Giuseppe Bartolomeo Chiari, Italian painter (b. 1654)
- September 25
- October 2 – Johann Conrad Brunner, Swiss anatomist (b. 1653)
- October 10
- November 10 – Alphonse de Tonty, French explorer and American settler (b. 1659)
- December 22 – Louis Phélypeaux, comte de Pontchartrain (b. 1643)
- December 26
- Jean-Baptiste de La Croix de Chevrières de Saint-Vallier, Catholic bishop of Quebec (b. 1653)
- Baltasar de Zúñiga, 1st Duke of Arión, viceroy of New Spain (b. 1658)
- date unknown
- Williams, Hywel (2005). Cassell's Chronology of World History. London: Weidenfeld & Nicolson. p. 301. ISBN 0-304-35730-8.
- Everett, Jason M., ed. (2006). "1727". The People's Chronology. Thomson Gale.
- "Fires, Great", in The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance, Cornelius Walford, ed. (C. and E. Layton, 1876) p49
- "Dornoch in the 18th century". Historylinks Museum. Retrieved August 27, 2010.
- K. M. Sheard (December 8, 2011). Llewellyn's Complete Book of Names: For Pagans, Wiccans, Druids, Heathens, Mages, Shamans & Independent Thinkers of All Sorts Who Are Curious about Na. Llewellyn Worldwide. pp. 304–. ISBN 978-0-7387-2368-6. Retrieved June 28, 2012.
- Neill, W. N. (1923). "the Last Execution for Witchcraft in Scotland, 1722". Scottish Historical Review. 20: 218–21. JSTOR 25519547.
- Schiavone, Michael J. (2009). Dictionary of Maltese Biographies Vol. 1 A–F. Pietà: Pubblikazzjonijiet Indipendenza. p. 755. ISBN 9789993291329.
- Schiavone, Michael J. (2009). Dictionary of Maltese Biographies Vol. 1 A–F. Pietà: Pubblikazzjonijiet Indipendenza. p. 756. ISBN 9789993291329.