Nils Stian Stiansen (16 August 1900 – 25 July 1974) was a Norwegian building contractor.
He was born in Fevik, a son of Peder Stiansen and Inga Marie Knudsen.
He operated as building contractor in Oslo from 1924, and constructed a number of residential houses and larger building complexes, a total of about 5,000 apartments.
Among his projects were Bakkehaugen, Hoff Terrasse, Øvrevollkollektivet, Økernbråten and Tokerud.
This Norwegian business biographical article is a stub.