Håkon Armand Menzoni Johnsen (3 March 1914 - 17 October 1991) was a Norwegian politician for the Labour Party.
He was born in Trondheim.
He was elected to the Norwegian Parliament from the Market towns of Sør-Trøndelag and Nord-Trøndelag counties in 1945, and was re-elected on six occasions. From 1969 to 1973 he was President of the Odelsting.
Johnsen was a member of Trondheim city council in 1937 - 1940, 1945 - 1947, 1947 - 1951 and 1951 - 1955. He was chairman of Arbeidernes Ungdomslag in Trondheim from 1932 to 1935, and of the county chapter of the Workers' Youth League from 1937 to 1938.