The knockout stage of the 2009 CONCACAF Gold Cup was the second and final stage of the competition, following the group stage. Played from 18 to 26 July, the knockout stage ended with the final, held at Giants Stadium in East Rutherford. The top two teams from each group, along with the two best-placed third teams, advanced to the knockout stage to compete in a single-elimination tournament. There were 7 matches in the knockout stage.
The knockout stage of the 2009 CONCACAF Gold Cup was contested between 8 teams that qualified from the group stage. Matches in the knockout stage were played to a finish. If the score of a match was level at the end of 90 minutes of playing time, extra time was played. If, after two periods of 15 minutes, the scores were still tied, the match was decided by a penalty shoot-out.
The quarter-finals opened with a double-header at Lincoln Financial Field in Philadelphia on July 18. The first match featured Canada and Honduras. The nightcap featured the United States and Panama.
The remaining two quarter-final matches were played the next day, again as a double-header, at Cowboys Stadium in Arlington, Texas; being the first match featured by Guadeloupe and Costa Rica; and Mexico and Haiti featuring the nightcap.
The two semi-final matchups were played as a double-header at Soldier Field in Chicago on July 23. The first match featured Honduras and hosts United States; the nightcap featured Costa Rica and Mexico.
Canada
Costa Rica
United States
Honduras
Haiti
Mexico
Guadeloupe
Nicaragua
Panama
Kyle Beckerman 
Hector Delgadillo
Walter Quesada 
64'
Carlos Pastrana
Roberto Moreno 
Ricardo Morgan
Geoffey Hospedales 
William Torres