Portugal's first participation in the Summer Olympic Games took place at the 1912 Summer Olympics in Stockholm, Sweden. The nation was represented by a delegation of six competitors, who took part in three sports but failed to win a medal. The Portuguese debut participation was marked by the death of flag bearer Francisco Lázaro, who succumbed to electrolytic imbalance after the marathon race.

Athletics

4 athletes represented Portugal in the nation's Olympic debut. Lázaro collapsed during the marathon due to his use of wax to prevent sweating; he died the next morning. Ranks given are within that athlete's heat for running events.

Fencing

A single fencer represented Portugal in that nation's Olympic debut. Fernando Correia was disqualified in the first round of the épée competition.

Wrestling

Greco-Roman

Portugal's Olympic debut included two wrestlers. Both wrestlers lost their first bout, won their second, and lost their third to be eliminated.

Officials