Eva Erdelyi (15 September 1943 – 17 March 1978) was a Hungarian swimmer.
She competed for Hungary in the 1964 Olympic Games on the 4x100 meter freestyle relay.
Between 1961 and 1965, Erdelyi participated as a member of the national swim team ten times altogether.
In 1961, she won a gold medal at the Italian-Hungarian swimming competition in San Remo, and as a member of the 4×100 meter freestyle team at the Hungarian National Championship, she finished in third place.
In 1962, at the British-Hungarian Swimming Competition, as a member of the 4×100 meter freestyle relay, she won a gold medal.
In the same year, in Piesteritzben at the East Germany – Hungary meeting she won a gold medal at the 100 meter freestyle.
She competed for her native country in the 1964 Olympic Games on the 4x100 meter freestyle relay.
The team finished in 4th place.
For her performance the Hungarian People's Republic granted her a Sporting Merit Silver Standard.
In 1965, at the annual Universiade (an international sport event specifically organized for university students by the International University Sports Federation) in Budapest, Hungary, on the 4x100 meter freestyle relay she won a gold and a bronze medal on 100 meter butterfly.
She earned a teaching degree in Hungarian literature, history, and physical education and later worked as a museologist.
In 1978, she was burned in an accidental gas explosion and died.
In her hometown, the annual Pro Agria Swimming Competition is dedicated to the town's most outstanding swimmers.
Four events within the competition were established in memory of Eva Erdelyi and in 2010-ben the city of Eger named a street after her.