Carl Johan Erik "John" Jansson (18 July 1892 – 10 October 1943) was a Swedish diver, who competed at the 1912, 1920 and 1924 Summer Olympics.

[1] In the 1912 Olympics, he won a bronze medal in the plain high diving event, was seventh in the 3 metre springboard, and was eliminated in the 10 metre platform event heats.

Eight years later, he won a bronze medal in the plain high diving event and was sixth in the 3 metre springboard.

In 1924, he won a silver medal in the plain high diving event.

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