The knockout stage of the 2011 CONCACAF Gold Cup started on June 18 and ended with the final on June 25, 2011.
The group winners and runners-up and the two best third placed teams from the group stage qualified.
The tournament bracket is shown below, with bold denoting the winners of each match.
Assistant referees: Daniel Williamson (Panama) William Torres (El Salvador) Fourth official: Jair Marrufo (United States) Assistant referees: Ricardo Morgan (Jamaica) Charles Morgante (United States) Fourth official: Joel Aguilar (El Salvador) Assistant referees: José Luis Camargo (Mexico) Alberto Morín (Mexico) Fourth official: Walter López (Guatemala) Assistant referees: Leonel Leal (Costa Rica) Óscar Velásquez (Honduras) Fourth official: Dave Gantar (Canada) Assistant referees: Héctor Vergara (Canada) Leonel Leal (Costa Rica) Fourth official: Dave Gantar (Canada) Assistant referees: Hermenerito Leal (Guatemala) Gerson López (Guatemala) Fourth official: Joel Aguilar (El Salvador) Assistant referees: Héctor Vergara (Canada) William Torres (El Salvador) Fourth official: Walter López (Guatemala)