Uunio Saalas born Sahlberg (18 February 1882 – 3 April 1969) was a Finnish entomologist and a professor of agriculture and forest zoology at the University of Helsinki (1925-1952).
He changed his name from Unio to Uunio and his surname to Saalas in 1906.
He received a doctorate in 1919 with a dissertation on the bark beetles of Finland.
He worked at the insect museum of the University of Helsinki and began to teach from 1923.
He was a founder of the Finnish Entomological Society in 1917 and edited the journal of the Finnish Entomological Society, Suomen Hyönteistieteellinen Aikaknusklrja, Annales Entomologici Fennici.