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.
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
Representing  Finland
| |||||
| 1978 | Košice Peace Marathon | Košice, Czechoslovakia | 3rd | Marathon | 2:16:50.2 [1] |
| 1979 | Košice Peace Marathon | Košice, Czechoslovakia | 1st | Marathon | 2:15:12 |
| 1980 | Olympic Games | Moscow, Soviet Union | — | Marathon | DNF |
| 1981 | Boston Marathon | Boston, United States | 12th | Marathon | 2:13:15 |
| 1982 | Tokyo Marathon | Tokyo, Japan | 5th | Marathon | 2:12:15 |
| 1986 | European Championships | Stuttgart, West Germany | — | Marathon | DNF |
| 1987 | Hamburg Marathon | Hamburg, West Germany | 5th | Marathon | 2:17:03 |
| 1990 | Hamburg Marathon | Hamburg, West Germany | 12th | Marathon | 2:17:14 |
| 1991 | Hamburg Marathon | Hamburg, Germany | 10th | Marathon | 2:17:09 |
| 1992 | Houston Marathon | Houston, United States | 8th | Marathon | 2:15:58 |