HMS Zinnia may refer to the following ships of the Royal Navy:
- HMS Zinnia (1915), an Azalea-class sloop active during World War I; launched in August 1915; sold in 1920
- HMS Zinnia (K98), a Flower-class corvette active during World War II; launched in November 1940; sunk August 1941 by U-564
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.