Ronald ("Ronaldo") Lanzoni Campos (born August 21, 1959) is a retired long-distance runner from Costa Rica. He claimed the silver medal at the 1987 Pan American Games in the Men's Marathon, and twice represented his native country at the Summer Olympics (1984 and 1988). He set his personal best (2:14.33) in the classic distance in 1987.
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
Representing  Costa Rica
| |||||
| 1984 | Olympic Games | Los Angeles, United States | — | Marathon | DNF |
| 1987 | Pan American Games | Indianapolis, United States | 2nd | Marathon | 2:20:39 |
| 1988 | Olympic Games | Seoul, South Korea | 40th | Marathon | 2:23:45 |
