Sass Henno (born September 13, 1982 in Tartu, Estonia) is an Estonian writer.

He attended Miina Härma Secondary Grammar School in Tartu between 1989-2001. 2001-2003 he studied computer graphics and advertising in Tartu Art College, then film and video directing in the Tallinn University between 2003-2005. Since 2007 he has been attending a master’s level screenwriting course in Baltic Film and Media School.

He won the first prize in Estonian Novel Competition 2005 with his work Mina olin siin. Esimene arest. A feature-length film based on the novel was released in 2008 (I Was Here).

Henno worked in Estonian Television as an assistant and director. Since 2005 he has been a member of Estonian Writers' Union. Since 2010 he works as a CEO of Spring Advertising ad agency Royal Service event marketing agency.