Back Anyos 1820 AN عقد 1820 Arabic عوام 1820 ARY عقد 1820 ARZ Década del 1820 AST 1820-ci illər AZ 1820-an BAN 1820-я BE 1820-я BE-X-OLD 1820-те Bulgarian
| Millennium: | 2nd millennium |
| Centuries: | 18th century – 19th century – 20th century |
| Decades: | 1790s 1800s 1810s – 1820s – 1830s 1840s 1850s |
| Years: | 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 1820s was the decade that began on January 1, 1820 and ended on December 31, 1829. It is distinct from the decade known as the '''183st decade''' which began on January 1, 1821. and ended on December 31, 1830.