HMS Walney (M104) was a Sandown-class minehunter of the British Royal Navy.

She was the fourth of the Sandown-class minehunters, and the second ship to carry the name, which comes from the island off Barrow-in-Furness in Cumbria on the north-west coast of England.

HMS Walney was one of four Sandown-class minehunters ordered from Vosper Thornycroft on 27 July 1987.

[1] She was laid down at Vosper Thoneycroft's Woolston, Southampton shipyard in May 1990, launched on 25 November 1991 and commissioned on 20 February 1993.

[1][2] On 15 May 2006, HMS Walney and HMS Atherstone discovered a 1,000 lb (450 kg) World War II bomb whilst conducting a survey of the River Mersey.