Sven Olof Morgan Andersson (5 April 1910 in Gothenburg – 21 September 1987 in Stockholm) was a Swedish Social Democratic politician. He served as Minister for Defence from 1957 to 1973, and as Minister for Foreign Affairs from 1973 to 1976. Andersson also served as Minister of Communications from 1951 to 1957.
He was during this time as a prominent Social Democratic cabinet minister a strong anti-Communist and defence hawk. He was a key player in the IB affair which became public knowledge in Sweden in 1973.
Andersson was among the editors-in-chief of Stockholms-Tidningen, a social democrat newspaper.
He was awarded the Illis quorum in 1987.