Killisnoo was an unincorporated community on Killisnoo Island in the Hoonah-Angoon Census Area in the U.S. state of Alaska, near Angoon which is on Admiralty Island. It is noted to have had a post office which closed in 1930. It has also been known by several names which include Kanas-nu, Kanasnu, Kenasnow and Killishoo.