| Gunder Anton Jahren | |
| Office: | Minister of Agriculture |
| Term Start: | 21 June 1920 |
| Term End: | 22 June 1921 |
| Primeminister: | Otto B. Halvorsen |
| Predecessor: | Håkon Five |
| Successor: | Martin Olsen Nalum |
| Office2: | President of the Storting |
| Term Start2: | 1 January 1925 |
| Term End2: | 31 December 1927 |
| Alongside2: | Ivar Lykke and C. J. Hambro |
| Primeminister2: | J. L. Mowinckel Ivar Lykke |
| Predecessor2: | Ivar Lykke Otto B. Halvorsen |
| Successor2: | C. J. Hambro |
| Office3: | President of the Lagting |
| Term Start3: | 1 January 1922 |
| Term End3: | 31 December 1926 |
| Predecessor3: | Magnus Nilssen |
| Successor3: | Helge Nilsen Thune |
| Term Start4: | 1 January 1909 |
| Term End4: | 31 December 1912 |
| Predecessor4: | Thore Torkildsen Foss |
| Successor4: | Andreas Andersen Grimsø |
| Birth Name: | Gunder Anton Johannessen Jahren |
| Birth Date: | 8 August 1858 |
| Birth Place: | Rakkestad, Østfold, United Kingdoms of Sweden and Norway |
| Death Place: | Oslo, Norway |
| Spouse: | Lisa Georgine Hansdatter Bjørneby |
| Children: | Several |
| Party: | Conservative |
Gunder Anton Johannesen Jahren (8 August 1858 - 20 May 1933) was a Norwegian politician for the Conservative Party. He was Minister of Agriculture 1920–1921.[1] He also represented Østfold in the Norwegian Parliament from 1903 to 1930, and became president of the legislature in 1925.[2]