HMS Oberon was the lead ship of the Oberon-class submarines, operated by the Royal Navy.

The Oberon class was a direct follow on of the Porpoise-class, with the same dimensions and external design, but updates to equipment and internal fittings, and a higher grade of steel used for fabrication of the pressure hull.

[2] Propulsion machinery consisted of 2 Admiralty Standard Range 16 VMS diesel generators, and two 3,000 shaft horsepower (2,200 kW) electric motors, each driving a 7-foot-diameter (2.1 m) 3-bladed propeller at up to 400 rpm.

[citation needed] She was the first of the class to have a deeper casing installed to house the equipment for initial training of SSN crews.

She was sold in 1987 to the Seaforth Group to be refitted for resale to Egypt, but was broken up at Grimsby in 1991.