HMS Sealion was the name of several ships and at least one land base of the Royal Navy.

• HMS Sealion (72S) - an S-class submarine active during World War II
• HMS Sealion (S07) - a Porpoise-class submarine of the Cold War period
• The Royal Navy's name for RAF Ballykelly, Northern Ireland. The Joint Anti-submarine School was located there along with several Fleet Air Arm units.^[1][2]

• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.

List of ships with the same or similar names

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.