HMS Porpoise was an torpedo cruiser of the Royal Navy, built by J. & G. Thompson at Glasgow and launched on 7 May 1886.
Commenced service on the Australia Station in December 1897. During the Samoan civil unrest in 1899, she took part in operations with and . She left the Australia Station and was paid off at Portsmouth 20 May 1901. After a refit at Sheerness, she joined the A Division of the Medway Fleet Reserve in February 1903. She was sold at Bombay on 10 February 1905.