Gunnar Haarstad (12 November 1916 – 13 April 1992) was a Norwegian jurist and police officer, a resistance member during World War II, and later head of the Norwegian Police Surveillance Agency for fifteen years.
Haarstad was born in Nittedal as the son of police sergeant Jørgen Haarstad and Agnes Azora Bordoe. One of his hobbies was sports shooting. He competed at the national competition Landsskytterstevnet several times, winning his junior class three years in a row. In his first senior year he placed fourth. He was also present at the 1937 ISSF World Shooting Championships in Helsinki, where he participated in a shooting competition between the Scandinavian capitals. Among his school friends from Secondary School was Tore Gjelsvik, who took private shooting lessons from him early in 1940. After finishing his secondary education at the Oslo Cathedral School in 1936, he studied law at the University of Oslo, and graduated as cand.jur. in 1941. His first job was as a junior solicitor in Halden. From 1942 he worked at the police in Oslo. He married Inger Tøger-Lie in 1942.
During the German invasion of Norway in April 1940 Haarstad participated in the Norwegian Campaign. Later he took part in various resistance activities, including working for the clandestine intelligence organization XU. He was arrested by the Germans 11 June 1944 and held at Møllergata 19 until 14 February 1945, when he was incarcerated at the Grini concentration camp until end of the war.