Iniesta, clad in a navy blue suit, posted a photo on Twitter on Sunday with his new wife Anna Ortiz saying “Amazing day! Just married.”
The 28-year-old midfielder helped Spain become the first nation to defend its continental crown with last Sunday's 4-0 win over Italy.
Iniesta, who scored the extra-time winner when Spain won its first World Cup two years ago, was named best player at Euro 2012 a day later.
Lionel Messi, Iker Casillas, Xavi Hernandez and Samuel Eto'o were among the guests.
People lined the streets leading to the wedding in Tamarit, with Barcelona teammate Gerard Pique tweeting “this looks like the Tour de France.”