Hiorthhamn is an abandoned settlement located on the east side of Adventfjorden on the island of Spitsbergen in Svalbard, Norway. It served as a coal mining camp from 1917 to 1921 operated by De Norske Kullfelter Spitsbergen. The settlement was named for the company's director, Fredrik Hiorth (1851-1923). Muskox were introduced in the area from Greenland in 1929, and the camp took the name Moskushamn in 1938. It reverted to its original name in 2002.