- Source: List of shipwrecks in May 1821
- List of shipwrecks in May 1821
- List of shipwrecks in 1821
- List of shipwrecks in January 1821
- List of shipwrecks in March 1821
- List of shipwrecks in February 1821
- List of shipwrecks in August 1821
- List of shipwrecks in June 1821
- List of shipwrecks in April 1821
- List of shipwrecks in October 1821
- List of shipwrecks in July 1821
The list of shipwrecks in May 1821 includes ships sunk, wrecked or otherwise lost during May 1821.