Knut Mauritz "Moje" Östberg (9 September 1897 – 13 November 1984) was a Swedish Navy rear admiral.
Östberg's senior commands include postings as captain of the coastal defence ships HSwMS Dristigheten and HSwMS Manligheten as well as captain of the seaplane cruiser HSwMS Gotland.
He also served as commanding officer of the West Coast Naval District as well as naval attaché in Berlin, Washington, D.C.