Gustaf Eric Carlberg (5 April 1880 – 14 August 1963) was a Swedish Army officer, diplomat, sport shooter, fencer, and modern pentathlete who competed at the 1906, 1908, 1912 and 1924 Olympics alongside his twin brother Vilhelm.

[1][2] Eric and Vilhelm were the youngest of four children of a veterinarian, who died when they were 12 years old.

In 1924, Eric married Elsa Lindell and was stationed for three years in Iran as part of the newly established Gendarmerie corps.

1912 Stockholm At the 1912 Summer Olympics, he won two gold and two silver medals in shooting.

1924 Paris In 1924, he finished ninth in the 25 metre rapid fire pistol event.