Jouni Ensio Kortelainen (born 9 June 1957 in Polvijärvi) is a retired male long-distance runner from Finland.
He represented his native country at the 1980 Summer Olympics in the men's marathon.
He set his personal best (2:12:09) in the classic distance on 3 May 1980, finishing in fourth place in Chemnitz.
Kortelainen won the men's national marathon title in 1986.
This biographical article relating to Finnish athletics is a stub.