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 top two placed teams from each of the six groups, along with the four best-placed third teams, qualified for the knockout phase.
| Group | Winners | Runners-up | Third-placed teams (Best two qualify) |
|---|---|---|---|
| A |  Canada |  Costa Rica | — |
| B |  United States |  Honduras |  Haiti |
| C |  Mexico |  Guadeloupe |  Nicaragua |
The tournament bracket is shown below, with bold denoting the winners of each match.
| Quarter-finals | Semi-finals | Final | ||||||||
| 18 July – Philadelphia | ||||||||||
| Canada | 0 | |||||||||
| 23 July – Chicago | ||||||||||
| Honduras | 1 | |||||||||
| Honduras | 0 | |||||||||
| 18 July – Philadelphia | ||||||||||
| United States | 2 | |||||||||
| United States (a.e.t.) | 2 | |||||||||
| 26 July – East Rutherford | ||||||||||
 Panama | 1 | |||||||||
| United States | 0 | |||||||||
| 19 July – Arlington | ||||||||||
| Mexico | 5 | |||||||||
| Guadeloupe | 1 | |||||||||
| 23 July – Chicago | ||||||||||
| Costa Rica | 5 | |||||||||
| Costa Rica | 1 (3) | |||||||||
| 19 July – Arlington | ||||||||||
| Mexico (p) | 1 (5) | |||||||||
| Mexico | 4 | |||||||||
| Haiti | 0 | |||||||||
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.
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Man of the Match: Assistant referees: |
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Kyle Beckerman Hector Delgadillo Luis Camargo Walter Quesada | Guadeloupe | 1–5 | Costa Rica |
|---|---|---|
Alphonse  64' | Report | Borges 3' Saborío 16', 71'Herrón 47'Herrera 89' |
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Álvaro Saborío 
Carlos Pastrana Roberto Giron Roberto Moreno
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Miguel Sabah 
Ricardo Morgan Anthony Garwood 
Geoffey Hospedales 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.
| Honduras | 0–2 | United States |
|---|---|---|
| Report | Goodson 45' Cooper 90' |
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Clarence Goodson Ricardo Morgan Anthony Garwood Marco Rodríguez | Costa Rica | 1–1 (a.e.t.) | Mexico |
|---|---|---|
| Ledezma 90+3' | Report | Franco 88' |
| Penalties | ||
Saborío  Borges Ledezma  Oviedo | 3–5 | Franco dos Santos Torrado Juárez Vela |
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Guillermo Ochoa Daniel Williamson
William Torres Joel Aguilar | United States | 0–5 | Mexico |
|---|---|---|
| Report | Torrado 56' (pen.) Dos Santos 62'Vela 68'J.A. Castro 78'Franco 90' |
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Giovani dos Santos Ricardo Morgan Willian Torres Joel Aguilar 
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