Draft:Gustav Collin

Karl Gustav Adolf Collin (23 May 1890 – 25 October 1966) was a Swedish swimmer. He competed in the 1912 Summer Olympics. Collin represented Stockholms KK.

In June 1912, Collin was nominated to represent his country in 400 metre freestyle and 1500 metre freestyle at the Olympic Games in his home town. Collin competed in the heats of the men's 1500 metre freestyle event at the 1912 Summer Olympics, but did not advance to the semi-finals. In 400 metre freestyle, he did not start. Later in 1912, Collin became the national championship bronze medalist in 1,000 metre freestyle for Stockholms KK when he finished behind Wille Andersson and Eskil Wedholm during the events in July.

Collin worked as a bath attendant and later in business. He was married to Tora.