The 2008–09 Swiss 1. Liga was the 77th season of this league and at this time was the third tier of the Swiss football league system. The 1. Liga was the highest level of amateur football, although a number of teams had professional or semi-professional players in their ranks.
Format
There were 48 teams in this division, including eight U-21 teams, the eldest youth teams of the professional clubs in the Super League and the Challenge League. The 1. Liga was divided into three regional groups, each with 16 teams. Within each group, the teams would play a double round-robin to decide their positions in the league. The three groups winners and three runners-up, together with the two best third placed teams, then contested a play-off for the two promotion slots. The U-21 teams are not eligible for promotion. The last placed two teams in each group would be relegated.
Note: The game between Grasshopper Club Zurich U-21 and FC St. Gallen U-21 was abandoned while the score was still 0-0 due to fan riots and was not counted.