Portugal has never won the World Cup, as of 2014. The World Cup has traditionally been dominated by Brazil, Italy and Germany, who have all claimed multiple titles.
It wasn't until 1966 that Portugal made its debut at the World Cup. While it performed well and made it past the group stages, the team ultimately was knocked out of the tournament in the semi-finals and went on to finish third. This finish is the best placing that Portugal has achieved in the World Cup. Only on one other occasion has Portugal reached the semi-finals, which was in 2006. Portugal finished in fourth place in that tournament after losing the semi-final game.