Johan Sigurd Karlsen (5 May 1894 – 11 June 1967) was a Norwegian politician for the Labour Party.
He was born in Fredrikstad.
He was elected to the Norwegian Parliament from Sør-Trøndelag in 1954, and was re-elected on two occasions.
Karlsen was mayor of Strinda municipality for a brief time in 1945, and deputy mayor from 1945–1947.