| Dag Jostein Fjærvoll | |
| Office: | Minister of Transport and Communications |
| Term Start: | 15 March 1999 |
| Term End: | 17 March 2000 |
| Primeminister: | Kjell Magne Bondevik |
| Predecessor: | Odd Einar Dørum |
| Successor: | Terje Moe Gustavsen |
| Office1: | Minister of Defence |
| Term Start1: | 17 October 1997 |
| Term End1: | 15 March 1999 |
| Primeminister1: | Kjell Magne Bondevik |
| Predecessor1: | Jørgen Kosmo |
| Successor1: | Eldbjørg Løwer |
| Office2: | Member of the Norwegian Parliament |
| Term Start2: | 1 October 1985 |
| Term End2: | 30 September 1997 |
| Constituency2: | Nordland |
| Office3: | Vice President of the Odelsting |
| Term Start3: | 11 October 1993 |
| Term End3: | 30 September 1997 |
| President3: | Gunnar Skaug |
| Predecessor3: | Tora Aasland |
| Successor3: | Jorunn Ringstad |
| Office4: | Vice President of the Lagting |
| Term Start4: | 10 October 1989 |
| Term End4: | 30 September 1993 |
| President4: | Hans J. Røsjorde |
| Predecessor4: | Sigurd Verdal |
| Successor4: | Magnar Sortåsløkken |
| Birth Date: | 20 January 1947 |
| Birth Place: | Hadsel, Nordland, Norway |
| Party: | Christian Democratic |
Dag Jostein Fjærvoll (20 January 1947 - 5 February 2021[1]) was a Norwegian politician for the Christian Democratic Party. He served as Minister of Defence from 1997 to 1999, and Minister of Transport and Communications from 1999 to 2000.[2]
His father Edmund Fjærvoll was also a member of Parliament.
He died sixteen days after his 74th birthday.