The 2009 San Marino and Rimini Riviera motorcycle Grand Prix was the thirteenth round of the 2009 Grand Prix motorcycle racing season.

It took place on the weekend of 4–6 September 2009 at the Misano World Circuit.

The MotoGP race was won by Valentino Rossi who extended his lead in the championship to 30 points.

[4] Below are the standings for the top five riders and constructors after round thirteen has concluded.

[8]