HSwMS Thor was an coastal defence ship of the Royal Swedish Navy.
Thor had her keel laid down on 26 October 1896 at Bergsunds Yard in Stockholm. She was launched on 7 March 1898, and completed on 7 August 1899. Thor displaced 3,300 tons, had a LPP of, a length of and a beam of . Her two triple-expansion steam engines could propel her at . She was used during the occupation of Åland. She was struck from service in 1937.