Papua New Guinea competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012.

Papua New Guinea Olympic Committee (PNGOC) sent a total of 8 athletes to the Games, an equal share of men and women, to compete in 5 different sports.

Swimmer Ryan Pini, who competed at his third Olympics, emerged as the nation's most successful athlete in history, after finishing eighth from Beijing in the men's butterfly event.

Sprinter Toea Wisil, who dominated the preliminary standings in London, was the nation's flag bearer at the opening ceremony.

Among the sports played by the athletes, Papua New Guinea marked its Olympic debut in judo.