John Dahlin
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John Dahlin (January 11, 1886 – July 12, 1927) was a Swedish track and field athlete who competed in the 1912 Summer Olympics.
In 1912 he qualified for the semi-finals of the 400 metres competition but he did not start in the race.
He was also a member of the Swedish relay team which was eliminated in the first round of the 4x400 metre relay event.