The 2009 Copa Mustang was the 62nd season of Colombia's top-flight football league, the Categoría Primera A.
Each tournament crowned a national champion and qualified for the 2010 Copa Libertadores.
Relegation was determined by an average of the points obtained in the First Stages of the past six tournaments (three seasons).
If there is a tie in points, goal difference would be taken into account, followed by a penalty shootout.
The aggregate table is the sum of all points and results throughout the entire season, including Cuadrangulares and Finals.