Niilo Yrjö Gideon Orasmaa, last name until 1906 Österman (13 July 1889, Tampere – 9 September 1970, Helsinki), was a Finnish diplomat. Orasmaa's parents were the merchant Mauritz Alexander Österman and Mathilda Sofia Wennerblom. He graduated in 1908 and graduated as a Master of Philosophy in 1924. Orasmaa was an Envoy to Buenos Aires, Montevideo and Santiago in 1937–1945, in Rio de Janeiro from 1946 to 1950 and in Belgrade and Athens in 1953–1956. From 1951 to 1953, he served as the post of Head of the Political Department of the Ministry of Foreign Affairs.