List of ship launches in 1820
The list of ship launches in 1820 includes a chronological list of some ships launched in 1820.
| Date | Ship | Class | Builder | Location | Country | Notes |
| 3 January | Merchantman | George Gooch | Rotherhithe |  UKGBI |
The list of ship launches in 1820 includes a chronological list of some ships launched in 1820.