Danno may refer to:
Stefan Dannö (born 1969), Swedish Speedway racer Danno O'Mahony (1912-1950), Irish professional wrestler Dan O'Keeffe (1907-1967), Irish Gaelic football goalkeeper nicknamed "Danno" Danny "Danno" Williams, a fictional character from the Hawaii Five-O television series, whence the catchphrase "Book 'em, Danno!"
See also Denno (disambiguation) Dano (disambiguation)