| 2023–24 HockeyAllsvenskan season | |
| League: | HockeyAllsvenskan |
| Sport: | Ice hockey |
| Duration: | 21 September 2023 – 7 March 2024 (regular season) |
| No Of Teams: | 14 |
| Season Champs: | Brynäs IF |
| Season Champ Name: | First place |
| Top Scorer: | Marcus Eriksson (Södertälje SK) |
| Promote: | Brynäs IF |
| Promote From: | SHL |
| Relegate: | Västerviks IK |
| Relegate To: | Hockeyettan |
| Seasonslistnames: | HockeyAllsvenskan |
| Prevseason Year: | 2022–23 |
| Nextseason Year: | 2024–25 |
The 2023–24 HockeyAllsvenskan season is the 19th season of HockeyAllsvenskan, the second-highest professional ice hockey league in Sweden. The season consists of 14 teams playing a regular season in which each team played each other team four times—twice at home and twice away. The regular season is followed by a series of promotion and relegation tournaments, with the teams finishing first through tenth participating in promotion playoffs, and those finishing thirteenth and fourteenth forced to requalify to avoid relegation to Hockeyettan.[1]
For the 2023–24 season, there were three team movements. Modo Hockey was promoted to the SHL as reigning 2023 HockeyAllsvenskan champions. Despite losing the play-out, Västerviks IK remained in the league as HC Vita Hästen was forced out due to a club bankruptcy.[2] Nybro Vikings and Kalmar HC were moved up from Hockeyettan.
Teams 7–10 from the regular season will play best-of-three playoff series, where team 7 face team 10 and team 8 face team 9. In each series the higher-seeded team have home-ice advantage, playing at home for game 2 (plus 3 if necessary) while the lower-seeded team play at home for game 1. The winners move on to the quarterfinals.[3]
Teams 1–6 from the regular season, along with the winners of the eighth-finals, will play best-of-seven series, with the winners moving on to the semifinals. The highest-seeded team chose whether to play the second-lowest seed or the lowest seed. In each series the higher-seeded team has home-ice advantage, playing at home for games 1 and 2 (plus 5 and 7 if necessary) while the lower-seeded team plays at home for games 3 and 4 (plus 6 if necessary) The higher-seeded half of the teams chose their opponents, with the highest-seeded remaining team choosing at each step.
The winners of the quarterfinals play best-of-seven series, with the winners moving on to the Finals. The highest-seeded team chose whether to play the second-lowest seed or the lowest seed. In each series the higher-seeded team has home-ice advantage, playing at home for games 1 and 2 (plus 5 and 7 if necessary) while the lower-seeded team plays at home for games 3 and 4 (plus 6 if necessary).
The winners of the semifinals will play a best-of-seven series, with the winner being promoted to the Swedish Hockey League (SHL). The higher-seeded team has home-ice advantage, playing at home for games 1 and 2 (plus 5 and 7 if necessary) while the lower-seeded team play at home for games 3 and 4 (plus 6 if necessary).
Teams 13 and 14 from the regular season will play a best-of-seven series, with the winner remaining in HockeyAllsvenskan and the loser being relegated to Hockeyettan. The higher-seeded team has home-ice advantage, playing at home for games 1 and 2 (plus 5 and 7 if necessary) while the lower-seeded team plays at home for games 3 and 4 (plus 6 if necessary).[4]