Otto Brusiin (2 June 1906 – 31 October 1973) was a leading Finnish teacher of law.
Recorded to have been a stirring teacher, Brusiin was also widely connected abroad.
In 1957, he was made first vice president of the International Association of Legal and Social Philosophy.
His thought was influenced by modern philosophical anthropology and a sociological interpretation of law.
Brusiin was the father of Kaarina Suonio, who was Finland's minister of education from 1982 to 1986.