Otto Ottosen Madsen (8 December 1904 – 3 August 1963) was a member of the Queensland Legislative Assembly.
[1] His brother, Mick Madsen, played rugby league for Australia.
[1] On 11 September 1924, Madsen married Nellie Inis Evans (died 1935) and together had two sons and two daughters.
[1] Madsen won the seat of Warwick at the 1947 Queensland state elections, defeating the sitting member, John Healy of the Labor Party.
[1] During his time in parliament he held the following ministerial portfolios:[1] Madsen was also a councilor on the Shire of Glengallan in 1942.