1821 in New Hampshire

1821 State of the Union Address

1821–1822 Massachusetts legislature

1821 in the United States

Niš conspiracy (1821)

1820–1821 Massachusetts legislature

Ottoman–Persian War (1821–1823)

List of members of the Storting, 1821–1823

Constantinople massacre of 1821

Siege of the Acropolis (1821–1822)

Wallachian uprising of 1821

1821 in the United Kingdom

Tejano Religion and Ethnicity, San Antonio, 1821–1860

Haciendas de Jalisco y Aledaños (1506–1821)

Samuel Gluckstein (1821–1873)

1453–1821: The Coming of Liberation

Astley baronets of Everley (1821)

1821 Pennsylvania's 10th congressional district special election

1820–1821 United States Senate election in Pennsylvania

1821 Pennsylvania's 5th congressional district special election

1821 North Carolina's 4th congressional district special election

Siege of Mankera (1821–1822)

The Mexican Frontier, 1821–1846

1820–1821 United States House of Representatives elections in Maine

Cross for the War of Independence 1821–29

1821 United States Senate election in New York

1820–1821 United States House of Representatives elections in Massachusetts

William Butler (1759–1821)

Thomas Lewis (1821–1897)

John Murphy (New South Wales politician, born 1821)

1821 New York's 6th congressional district special election

Aldebert de Chambrun (1821–1899)

Battle of the Trench (1821)

1820–1821 United States House of Representatives elections in Vermont

1821 in Iceland

1821 Norfolk and Long Island hurricane

1821 United States House of Representatives elections in New York

1820–21 United States Senate elections

Edmund Bourke (1761–1821)

1821 in archaeology

List of shipwrecks in 1821

1821 South Carolina's 9th congressional district special election

Timeline of Eastern Orthodoxy in Greece (1821–1924)

1821 New Jersey's at-large congressional district special election

List of shipwrecks in October 1821

List of shipwrecks in July 1821

Henry Arthur Herbert (1756–1821)

List of shipwrecks in May 1821

List of shipwrecks in March 1821

List of shipwrecks in February 1821

List of shipwrecks in August 1821

List of shipwrecks in April 1821

List of shipwrecks in January 1821

List of shipwrecks in June 1821

1821 in birding and ornithology

1821 Georgia gubernatorial election

1821 in Denmark

Alexander Murray (1755–1821)

List of shipwrecks in September 1821

William H. Carpenter (1821–1885)

Colombian Constitution of 1821

1821 in Ireland

1821 Land Lottery

William Douglas (advocate)

1821 in Portugal

Thomas Lyon-Bowes, Master of Glamis (born 1821)

1821 in Germany

The Australian Magazine (1821)

List of shipwrecks in December 1821

List of shipwrecks in November 1821

1821 Virginia gubernatorial election

List of ship launches in 1821

1821 Maine gubernatorial election

1821 Tennessee gubernatorial election

William Jones (Welsh priest)

1821 Maryland gubernatorial election

1821 in Scotland

List of elections in 1821

1821 Kentucky's 8th congressional district special election

1821 in science

List of Catholic dioceses in Germany between 1821 and 1993

1821 in Australia

1821 in architecture

Battle of Erzurum (1821)

1821 Massachusetts gubernatorial election

William Bromley-Davenport (1821–1884)

1821 Coronation Honours

1821 in literature

Charles Powell Leslie (1821–1871)

Phoenix (1821 whaler)

1820–21 United States House of Representatives elections

Massachusetts Constitutional Convention of 1820–1821

1821 New Hampshire gubernatorial election

1821 Connecticut gubernatorial election

1821 Mississippi gubernatorial election

1821 North Carolina gubernatorial election

Treaty of Chicago

1821: The Struggle for Freedom

1821 in New Zealand

1821 Rhode Island gubernatorial election

Archduke Friedrich of Austria (1821–1847)

Lunacy (Ireland) Act 1821

The 1821 Derby at Epsom

USS Dolphin (1821)

History of Panama (1821–1903)

1821 Vermont gubernatorial election

1821 New Jersey gubernatorial election

1821 Light Regiment (India)

Relief Act of 1821

Sacred Band (1821)

1821 Alabama gubernatorial election

Damon and Pythias (1821 play)

1821 in paleontology

1821 in South Africa

1821 in rail transport

Carmichael baronets of Nutwood (1821)

Modern Greece: A History Since 1821

Battle of Carabobo order of battle

King baronets of Corrard (1821)

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Ogle Castle (1821 ship)

HMS Alligator (1821)

Dundas baronets of Beechwood (1821)

James Weller Ladbroke

Second inauguration of James Monroe

HMS Nereus (1821)

List of acts of the Parliament of the United Kingdom from 1821

Eastern Orthodoxy in Greece

Battle of Novara (1821)

1821 United States House of Representatives election in Alabama

Lindsay baronets of West Ville (1821)

The Greek Revolution

Charles Murray (Scottish actor)

USS Shark (1821)

September 1821 New England tornado outbreak

George Barrett (actuary)

Grampound (UK Parliament constituency)

Townsend-Farquhar baronets of Mauritius (1821)

1821 United States House of Representatives election in Connecticut

John Stuart (Presbyterian minister)

Duchy of Lancaster Act 1821

Timeline of Eastern Orthodoxy in Greece (1453–1821)

1821 United States House of Representatives elections in North Carolina

List of compositions by Franz Schubert (1821)

Florentia (1821 ship)

Treason (Ireland) Act 1821

John Cotes (died 1821)

William Young (Royal Navy officer, born 1751)

James A. Baker (born 1821)

1821 United States House of Representatives elections in Tennessee

Henry King (died 1821)

Recovery (1821 ship)

Young baronets of Bailieborough Castle (1821)

PS Kingston (1821)

Richard Blaker (cricketer, born 1821)

United Nations Security Council Resolution 1821

Prince Regent (1821 packet)

George Benson Hall

USS Grampus (1821)

HMS Ganges (1821)

Shaw baronets of Bushy Park (1821)

John Smith (New South Wales politician, born 1821)

1821 United States House of Representatives elections in Virginia

Nimrod (1821 ship)

Massacre of Samothrace (1821)

Bani Bu Ali expedition

First Mexican Empire

HMS Grecian (1821)

Bilateral relations between Mexico and the Holy See (1821–1855)

History of Peru (1821–1842)

Department of Lima

John Kimball (politician, born 1821)

Peter Augustus Jay (born 1821)

Battle of Carabobo

Siege of Tripolitsa

Eleanor (1821 ship)

Jonathan Mayhew Wainwright (naval officer)

Treaty of Indian Springs (1821)

William Taylor (Surrey cricketer)

Robert Gibson (cricketer, born 1821)

Aleksander Branicki

Scott baronets of Lytchet Minster (1821)

Greek War of Independence

George Hunter (politician, born 1821)

PS Eagle (1821)

Ion C. Brătianu