Peder Johnsen (baptised 30 November 1783 – 10 June 1836) was a Norwegian sailor who served as a representative at the Norwegian Constituent Assembly in 1814.Peder Johnsen was born at Tvedestrand in Aust-Agder, Norway.
He was the youngest of ten siblings.
Johnsen served as a commissioner officer in the Royal Norwegian Navy.
He was an accountant at Kristiansand shipyard in Vest-Agder, before he was assigned as a midshipman.
In later years, he was the captain of the bark De Tvende Brødre.Peder Johnsen represented The Royal Norwegian Navy (Søe-Deffensionen) at the Norwegian Constituent Assembly.
together with Jens Schow Fabricius,
Thomas Konow, and Even Thorsen.
He belonged to the independence party (Selvstendighetspartiet).
In 1810, Peder Johnsen married Catharine Margrethe Nielsdatter (1788-1832).
They were the parents of seven children.
The family lived on Skippergata street in the central business district of Kvadraturen in Kristiansand.