HNoMS Harald Haarfagre, known locally as Panserskipet Harald Haarfagre, was a Norwegian coastal defence ship. She, her sister-ship Tordenskjold and the slightly newer Eidsvold-class were built as part of the general rearmament in the time leading up to the events in 1905. Harald Haarfagre remained an important vessel in the Royal Norwegian Navy until she was considered unfit for war in the mid-1930s.