Juha (Jussi) Olavi Montonen (1 May 1924 Helsinki – 10 October 2015 Helsinki) was a Finnish diplomat.
He was a Bachelor of Philosophy degree.
He was Ambassador of Finland to Madrid in 1969-1972, in Warsaw from 1972 to 1976, Head of the Administrative Department of the Ministry for Foreign Affairs from 1976 to 1978, Ambassador México from 1978 to 1984 and Bucharest in 1984–1986.