Arne Magnussen (31 March 1884 – 3 September 1970) was a Norwegian trade unionist, newspaper editor and politician for the Labour and the Social Democratic Labour parties. He was elected to the Parliament of Norway from the urban constituency of Moss og Drøbak in . In 1921, when the Social Democratic Labour Party split away from the Labour Party, he joined the Social Democrats and was re-elected in the newly created constituency Market towns of Østfold and Akershus. He was re-elected on one occasion in 1924, but not on the next occasion in 1927. In 1930, having rejoined the Labour Party, he was elected for the last time, and sat through the term which ended in 1933.