The 2012 San Marino and Rimini Riviera motorcycle Grand Prix was the thirteenth round of the 2012 Grand Prix motorcycle racing season.

It took place on the weekend of 14–16 September 2012 at the Misano World Circuit Marco Simoncelli.

The Moto2 race was stopped after 3 laps due to an oil spill from Gino Rea's bike.

It was restarted and reduced to 14 laps, with the starting grid determined by the running order in the first part.

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