The men's long jump was a track and field athletics event held as part of the athletics at the 1912 Summer Olympics programme. The competition was held on Friday, July 12, 1912. Thirty long jumpers from 13 nations competed. NOCs could enter up to 12 athletes. The event was won by Albert Gutterson of the United States, the nation's fifth gold medal in the event in five Games. Calvin Bricker of Canada became the second man to win a second medal in the long jump, adding a silver to his 1908 bronze. Sweden won its first long jump medal with Georg Åberg's bronze.

These are the results of athletics competition at the 1912 Summer Olympics. 30 events were contested, all for men only.