• 1820s disasters by country‎ (12 C)
• 1820s in international relations‎ (10 C)
• 1820s in politics by country‎ (4 C)
• 1820s in sports by country‎ (3 C)

*

• 1820s in Central America‎ (12 C)
• 1820s in the Caribbean‎ (16 C, 1 P)

/

• 1820s disestablishments by country‎ (49 C)
• 1820s establishments by country‎ (116 C)

0–9

• 1820 by country‎ (55 C, 16 P)
• 1821 by country‎ (58 C, 16 P)
• 1822 by country‎ (56 C, 15 P)
• 1823 by country‎ (57 C, 16 P)
• 1824 by country‎ (61 C, 15 P)
• 1825 by country‎ (61 C, 16 P)
• 1826 by country‎ (69 C, 17 P)
• 1827 by country‎ (56 C, 17 P)
• 1828 by country‎ (60 C, 20 P)
• 1829 by country‎ (64 C, 18 P)

A

• 1820s in Afghanistan‎ (3 C, 1 P)
• 1820s in Argentina‎ (12 C, 4 P)
• 1820s in Australia‎ (12 C)
• 1820s in the Austrian Empire‎ (12 C, 1 P)

B

• 1820s in Baden‎ (2 C)
• 1820s in Barbados‎ (2 C)
• 1820s in Bavaria‎ (5 C)
• 1820s in Bolivia‎ (6 C, 2 P)
• 1820s in Brazil‎ (12 C, 13 P)
• 1820s in the Empire of Brazil‎ (2 C)
• 1820s in Bremen‎ (2 C)
• 1820s in the British Empire‎ (26 C)
• 1820s in British India‎ (5 C)
• 1820s in Bulgaria‎ (2 C, 1 P)
• 1820s in Burma‎ (6 C, 1 P)

C

• 1820s in Canada‎ (17 C, 1 P)
• 1820s in the Cape Colony‎ (7 C)
• 1820s in Cape Verde‎ (1 C)
• 1820s in Ceylon‎ (5 C)
• 1820s in Chile‎ (12 C, 12 P)
• 1820s in China‎ (10 C, 8 P)
• 1820s in Colombia‎ (6 C)
• 1820s in Costa Rica‎ (3 C, 3 P)
• 1820s crimes by country‎ (19 C)
• 1820s in Croatia‎ (3 C)
• 1820s in the Crown Dependencies‎ (2 C)
• 1820s in Cuba‎ (2 C, 3 P)

D

• 1820s in the Danish colonial empire‎ (1 P)
• 1820s in Denmark‎ (13 C, 10 P)
• 1820s in the Dominican Republic‎ (2 C)
• 1820s in the Dutch Empire‎ (8 C)

E

• 1820s in Ecuador‎ (4 C, 4 P)
• 1820s in Egypt‎ (2 C, 1 P)
• 1820s in El Salvador‎ (4 C, 2 P)
• 1820s in Estonia‎ (1 C)

F

• 1820s in Fiji‎ (2 C, 2 P)
• 1820s in Finland‎ (3 C)
• 1820s in France‎ (15 C, 11 P)

G

• 1820s in Georgia (country)‎ (2 C, 4 P)
• 1820s in Germany‎ (17 C)
• 1820s in Gibraltar‎ (2 C)
• 1820s in Gold Coast (British colony)‎ (2 C)
• 1820s in Greece‎ (14 C, 3 P)

H

• 1820s in Haiti‎ (3 C, 7 P)
• 1820s in the Kingdom of Hanover‎ (2 C)
• 1820s in Hawaii‎ (7 C)
• 1820s in Honduras‎ (2 C, 1 P)

I

• 1820s in India‎ (13 C, 3 P)
• 1820s in Iran‎ (6 C, 5 P)
• 1820s in Ireland‎ (14 C, 11 P)
• 1820s in the Isle of Man‎ (2 C)
• 1820s in Italy‎ (14 C, 1 P)

J

• 1820s in Jamaica‎ (2 C)
• 1820s in Japan‎ (6 C, 6 P)

L

• 1820s in Laos‎ (1 P)
• 1820s in Liberia‎ (2 C, 1 P)
• 1820s in Lithuania‎ (3 C)
• 1820s in Luxembourg‎ (5 C)

M

• 1820s in Malta‎ (5 C)
• 1820s in Mexico‎ (20 C, 9 P)
• 1820s in Morocco‎ (3 C)
• 1880s in Morocco‎ (2 C, 1 P)

N

• 1820s in the Netherlands‎ (14 C)
• 1820s in New Brunswick‎ (6 C)
• 1820s in New Spain‎ (9 C)
• 1820s in New Zealand‎ (12 C, 3 P)
• 1820s in Norway‎ (13 C, 10 P)

O

• 1820s in the Ottoman Empire‎ (17 C, 3 P)
• 1820s in Ottoman Syria‎ (3 C)

P

• 1820s in Panama‎ (1 C)
• 1820s in the Papal States‎ (5 C)
• 1820s in Peru‎ (11 C, 3 P)
• 1820s in the Philippines‎ (3 C)
• 1820s in Poland‎ (7 C)
• 1820s in Portugal‎ (13 C, 6 P)
• 1820s in the Portuguese Empire‎ (7 C)
• 1820s in Prince Edward Island‎ (5 C)
• 1820s in Prussia‎ (8 C)
• 1820s in Puerto Rico‎ (2 C, 1 P)

R

• 1820s in Romania‎ (4 C, 3 P)
• 1820s in the Russian Empire‎ (16 C, 1 P)

S

• 1820s in the Kingdom of Sardinia‎ (3 C)
• 1820s in Saxony‎ (2 C)
• 1820s in Scotland‎ (15 C, 12 P)
• 1820s in Serbia‎ (2 C, 2 P)
• 1820s in Siam‎ (5 C, 6 P)
• 1820s in the Kingdom of the Two Sicilies‎ (3 C)
• 1820s in Singapore‎ (6 C)
• 1820s in South Africa‎ (9 C, 3 P)
• 1820s in Spain‎ (14 C, 3 P)
• 1820s in the Spanish East Indies‎ (4 C)
• 1820s in Sudan‎ (1 P)
• 1820s in Sweden‎ (12 C, 1 P)
• 1820s in Switzerland‎ (4 C, 2 P)

T

• 1820s in Taiwan‎ (5 C)
• 1820s in Tonga‎ (1 C)
• 1820s in Trinidad and Tobago‎ (2 C)
• 1820s in the Grand Duchy of Tuscany‎ (4 C)

U

• 1820s in the United Kingdom‎ (26 C, 25 P)
• 1820s in the United States‎ (23 C, 30 P)
• 1820s in Uruguay‎ (7 C, 4 P)

V

• 1820s in Venezuela‎ (4 C, 2 P)
• 1820s in Vietnam‎ (3 C)

W

• 1820s in Wales‎ (10 C, 11 P)
• 1820s in Wallachia‎ (1 C, 1 P)