2009 Swedish Touring Car Championship season

The 2009 Swedish Touring Car Championship season was the 14th Swedish Touring Car Championship (STCC) season. It was decided over nine race weekends (comprising eighteen races) at six different circuits.

Tommy Rustad won the drivers' championship for the second time. The ethanol powered Volvo C30 of Polestar Racing proved to be the fastest car over one lap, as evidenced by them setting all fastest qualifying times during the season (although grid penalties ruined the perfect score), but they were plagued by bad reliability. Instead, Thed Björk, driving for Flash Engineering, lead the championship most of the season, only to be overtaken in the last race.

The team championship also went down to the wire, with Polestar Racing besting WestCoast Racing by one point in the last race.

The entry of the Biogas.se team with their Volkswagen Scirocco meant the debut of a biogas powered car in STCC. Unfortunately, they had trouble matching the pace of the other factory teams and ended up last in the team championship.

There were several rule changes for the 2009 season.

Race format changes:

Other changes:

These were the STCC entries for the 2009 season. Drivers with numbers 88 and higher also competed in Semcon Cup, open for privateers only. All teams were Swedish-registered.

* Mikko Tiainen, Petter Granlund and Joakim Ahlberg were on the official entry list, but failed to participate in any races during the season.

The race calendar for this season was as follows:

The points system used for both the main championship and Semcon Cup was the standard FIA system of 10-8-6-5-4-3-2-1, awarded to the top eight finishers of each race. In case of ties in points, the championship positions were determined by the classification in the latest race.

* Robert Dahlgren set the fastest qualifying time, but was moved down 10 places on the grid, due to engine changes.

^♯ Robert Dahlgren set the fastest qualifying time, but was moved down 10 places on the grid, due to having received two yellow cards for unfair driving.

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