Thorstein Treholt (13 April 1911 – 17 March 1993) was a Norwegian politician for the Labour Party. He was the father of convicted Norwegian spy Arne Treholt. He was born in Skoger. An agronomist by education, Treholt was state secretary to the Minister of Agriculture from 1954 to 1957, serving under three different ministers during the period (Rasmus Nordbø, Olav Meisdalshagen and Harald Johan Løbak). He later became the Minister of Agriculture in 1971–1972 in the first cabinet Bratteli and 1973–1976 in the second cabinet Bratteli, the two periods only interrupted by the non-labour cabinet Korvald. Meanwhile, Treholt was appointed to cabinet his place was filled by and Åge Hovengen.