|Name HMS Oberon|
Commissioned 24 August 1927
Identification Pennant number P21
Construction started 22 March 1924
Length 84 m
|Laid down 22 March 1924|
Decommissioned 5 July 1944
Fate Scrapped 1945
Launched 24 September 1926
HMS Oberon was an Odin-class submarine of the Royal Navy.
Oberon was the first of the O-Class submarines. She was laid down on 24 September 1926 at the Chatham Dockyard. She was commissioned on 24 August 1927. On 11 October 1935, she collided with the destroyer Thanet at Devonport. Placed in reserve in 1937, Oberon was recommissioned on 2 August 1939 and was used for training during World War II. She was decommissioned at Blyth on 5 July 1944 and was sold for scrap on 24 August 1945.