Kaarlo Anton "Kalle" Koskelo (12 April 1888 – 21 December 1953) was a Greco-Roman wrestler from Finland who won the featherweight event at the 1912 Olympics. He then fought in World War I and Finnish Civil War, and in 1919 immigrated to the United States. He settled in Astoria, Oregon, where he became a prominent local businessman.

Family

Kaarlo Koskelo married Lydia Koskelo (née Husa, 1889–1973) in 1909. Their son Elmer Koskelo (1912–1997) was a star javelin thrower at the University of Oregon.