| Millennia |
|---|
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| Categories |
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.