At least three ships of the British Royal Navy have been named HMS Locust, for the insect.

was a 14-gun brig, launched at Deptford in 1801, that served in the Channel and was sold in 1814. was a paddle-steamer , launched in 1840 and sold in 1895. was an (later grouped into the 30-knot, 4-funnel B-class grouping). She was completed in 1896 and scrapped in 1919. was a , launched in 1939 and broken up in 1968.

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