| Knut Frydenlund | |
| Office: | Minister of Foreign Affairs |
| Term Start2: | 16 October 1973 |
| Term End2: | 14 October 1981 |
| Primeminister2: | Trygve Bratteli Odvar Nordli Gro Harlem Brundtland |
| Predecessor2: | Dagfinn Vårvik |
| Successor2: | Svenn Stray |
| Term Start1: | 9 May 1986 |
| Term End1: | 26 February 1987 |
| Primeminister1: | Gro Harlem Brundtland |
| Predecessor1: | Svenn Stray |
| Successor1: | Thorvald Stoltenberg |
| Office3: | Member of the Norwegian Parliament |
| Term Start3: | 1 October 1969 |
| Term End3: | 26 February 1987 |
| Constituency3: | Oslo |
| Birth Date: | 31 March 1927 |
| Birth Place: | Drammen, Buskerud, Norway |
| Death Place: | Oslo, Norway |
| Spouse: | Grethe Nilsen (1958 - 1987; his death) |
| Party: | Labour |
Knut Frydenlund (31 March 1927 - 26 February 1987) was a Norwegian diplomat and politician for the Labour Party who served as foreign minister from 1973 to 1981 and again from 1986 to 1987.[1]
Frydenlund was born in Drammen and began his diplomatic career in the 1950s, initially serving at the Norwegian embassy in Bonn, and served in various diplomatic positions during the 1950s and the 1960s. In 1969, he was elected to parliament as a member of the Norwegian Labour Party, and he became foreign minister in the Labour government in 1973. While Labour was out of power from 1981 to 1986, he was replaced as foreign minister by Svenn Thorkild Stray, but returned to the office in May 1986.
In February 1987, following his return from a Nordic Council meeting in Helsinki, Frydenlund collapsed at Oslo's Fornebu Airport due to a cerebral hemorrhage and died soon afterward at Ullevaal Hospital in Oslo.