| Office: | Chairman of Foreningen Norden in Norway |
| Term Start: | 1969 |
| Term End: | 1981 |
| Predecessor: | Harald Throne-Holst |
| Successor: | Helge Seip |
| Office2: | Minister of Fisheries |
| Term Start2: | 1 July 1946 |
| Term End2: | 19 November 1951 |
| Primeminister2: | Einar Gerhardsen |
| Predecessor2: | Position established |
| Successor2: | Peder Holt |
| Office3: | Member of the Norwegian Parliament |
| Term Start3: | 4 December 1945 |
| Term End3: | 30 September 1961 |
| Constituency3: | Nordland |
| Birth Date: | 1 July 1908 |
| Birth Place: | Bodin, Nordland, Norway |
| Death Place: | Oslo, Norway |
| Spouse: | [1] |
| Party: | Labour |
Reidar Carlsen (1 July 1908 – 2 May 1987) was a Norwegian politician for the Labour Party.[2]
Reidar Carlsen was born in Bodin Municipality in Nordland county, Norway. He studied at the National School of Forestry (Skogskolen) in the town of Steinkjer (1928–1929).
He was Member of Parliament of Norway from 1945 to 1961. He was Minister of Trade 1945–1946, and Minister of Fisheries 1946–1951. He served as Director of the Regional Development Fund 1961–78.