Viktor Jalmar "Jalmari" Kivenheimo (25 September 1889 – 29 October 1994) was a Finnish gymnast who competed in the 1912 Summer Olympics.He was part of the Finnish team, which won the silver medal in the gymnastics men's team, free system event.
He is the longest lived Olympic medalist, as he died in 1994 at the age of 105 years.