HMS Erne, pennant number U03, was a Black Swan-class sloop in the Royal Navy.

She was laid down by Furness Shipbuilding at Haverton Hill-on-Tees, Co. Durham on 21 September 1939, launched on 5 August 1940 and commissioned on 3 April 1941.

On 30 April 1941, while Erne was still at the builders yard (4 days after commissioning), a near miss during a German air attack caused heavy damage.

On 31 July 1942, depth charges from the three British sloops Erne, Rochester and Sandwich sank the German submarine U-213 in the North Atlantic east of the Azores, in position 36º45'N, 22º50'W.

A torpedo had caused extensive flooding of the forward holds, which forced the 56 crew members and twelve passengers to abandon ship in the early morning.