Santiago Lorenzo (born May 4, 1978 in Buenos Aires) is a male decathlete from Argentina who competed for his native country at the 2004 Summer Olympics in Athens, Greece. He set his personal best score (7889 points) in Eugene, Oregon on May 31, 2001.
| Year | Competition | Venue | Position | Notes |
|---|---|---|---|---|
| Representing Argentina | ||||
| 1997 | South American Championships | Mar del Plata, Argentina | 2nd | Decathlon |
| 1999 | Pan American Games | Winnipeg, Canada | 5th | Decathlon |
| South American Championships | Bogotá, Colombia | 1st | Decathlon | |
| 2001 | World Student Games | Beijing, PR China | 9th | Decathlon |
| 2003 | Pan American Games | Santo Domingo, Dominican Republic | 4th | Decathlon |
| 2004 | Olympic Games | Athens, Greece | 24th | Decathlon |