1774 1775 1776 – 1777 – 1778 1779 1780
| Decades: |
1740s 1750s 1760s – 1770s – 1780s 1790s 1800s
| Centuries: |
17th century – 18th century – 19th century
1777 was a common year starting on Wednesday (see link for calendar).
- The Cornish language died out
- 2nd edition of Encyclopædia Britannica published
- January 3 – American general George Washington defeats British general Charles Cornwallis at the Battle of Princeton.
- January 12 – Mission Santa Clara de Asís is founded in what is now Santa Clara, California
- January 16 – Vermont declares its independence from New York becoming an independent country, a status it retained until it joined the United States as the 14th state in 1791
- June 13 – American Revolutionary War: Marquis de Lafayette lands near Charleston, South Carolina to help the Continental Congress train its army.
- June 14 – Stars and Stripes adopted by the Continental Congress as the Flag of the United States.
- August 16 – American Revolutionary War: Battle of Bennington – British forces are defeated by American troops.
- September 3 – American Revolutionary War: The Flag of the United States flies in battle for the first time, at Cooch's Bridge in Maryland.
- October 17 – American Revolutionary War: Battle of Saratoga- American troops defeat the British.
- November 15 – American Revolutionary War: After 16 months of debate, the Continental Congress approves the Articles of Confederation in the temporary American capital at York, Pennsylvania.
- November 29 – San Jose, California founded. It is the first pueblo in Spanish Alta California.
- December 24 – Kiritimati discovered by James Cook
- The code duello is adopted at the Clonmell Summer Assizes as the form for pistol duels in Ireland. It is quickly denounced but nevertheless widely adopted throughout the English-speaking world.
- January 2 – Christian Daniel Rauch, German sculptor (d. 1857)
- February 12 – Friedrich de la Motte Fouque, French poet (d. 1843)
- March 17 – Roger Taney, Chief Justice of the United States (b. 1864)
- April 12 – Henry Clay, American statesman (d. 1852)
- April 30 – Carl Friedrich Gauss, German mathematician, astronomer, and physicist (d. 1855)
- August 14 – Hans Christian Ørsted, Danish physicist and chemist (d. 1851)
- October 16 – Lorenzo Dow, American Methodist preacher (d. 1834)
- December 4 – Madame Récamier, French writer (d. 1849)
- December 23 – Emperor Alexander I of Russia (d. 1825)