| 2008–09 HockeyAllsvenskan season | |
| League: | HockeyAllsvenskan |
| Sport: | Ice hockey |
| Duration: | 45 game regular season |
| No Of Teams: | 16 |
| Attendance: | 850,771 |
| Average Attendance: | 2,363 |
| Season Champs: | Leksands IF |
| Season Champ Name: | First place |
| Promote: | None |
| Promote From: | HockeyAllsvenskan |
| Relegate: | Huddinge IK Mariestad BoIS HC Nybro Vikings IF 3 teams relegated due to league contraction to 14 teams |
| Relegate To: | Division 1 |
| Seasonslistnames: | HockeyAllsvenskan |
| Prevseason Year: | 2007–08 |
| Nextseason Year: | 2009–10 |
The 2008–09 HockeyAllsvenskan season was the fourth season of the HockeyAllsvenskan, the second level of ice hockey in Sweden. 16 teams participated in the league, and the top four qualified for the Kvalserien, with the opportunity to be promoted to the Elitserien.
Due to the league reducing the number of teams from 16 to 14 teams for the 2009–10 season, the worst team (Mariestad) was relegated to Division 1 while the other two worst teams, ranked 14–15 (Huddinge and Nybro) had to play in the relegation round for survival in HockeyAllsvenskan. In the relegation round, only the best team (Örebro) qualified for the following HockeyAllsvenskan season.