Reidar Smestad (8 May 1888 – 29 June 1962) was a Norwegian industrialist and landowner, the son of Carl Smestad and grandson of Jacob Olssøn Smestad.^[1][2]

After studying mining engineering at Bergakademie Berlin^{[3][failed verification]}, he built up a mining company with assets such as the soapstone mining facilities in Kvam, which were later acquired by Norsk Hydro and AS Granitt, as well as the soapstone facilities in Lalm.^[4]

Smestad died on 29 June 1962 and is buried at the cemetery at Ullern Church.^[5]