Viktor Gustaf Balck (25 April 1844 – 31 May 1928) was a Swedish Army officer and sports personality who was one of the original members of the International Olympic Committee, president of the International Skating Union for 30 years, the driving force behind the Nordic Games, and who is often called "the father of Swedish sports".

He was assistant instructor at Karlberg from 1868 to 1870, then gymnastics teacher at the Swedish Army Riding and Horse-Driving School at Strömsholm, 1870-1872.

Determined to change this, from the 1870s he participated in the formation of several sporting clubs and organisations, and the founding of several related journals.

The official application to arrange the games came in 1908, and despite strong competition from Berlin, Stockholm were chosen to host the 1912 Summer Olympics with Balck a prominent member of the national organising committee.

According to figure skating historian James R. Hines, Balck succeeded William J. H. Mulier as president of the ISU when Muller resigned after a scoring controversy at the 1893 European Championships.