Two ships of the Royal Navy have borne the name HMS Southdown:
- HMS Southdown (1917) was a Hunt-class minesweeper launched in 1917 and sold in 1926.
- HMS Southdown (L25) was a Hunt-class destroyer launched in 1940 and scrapped in 1956.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.