At least two ships of the Royal Navy have borne the name HMS Fiona:
- HMS Fiona (1905) was an armed boarding steamer in the First World War. She was wrecked in 1917.
- HMS Fiona (1927) was an armed boarding vessel in the Second World War. She was sunk by air attack in 1941.
- RMAS Fiona (A148) was a Felicity-class water tractor – akin to a tug – in service during the 1980s
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.