| Medal record | ||
|---|---|---|
| Men's Rowing | ||
| Competitor for Ireland | ||
| Rowing World Championships | ||
| Gold | 1991 Vienna | LM1x |
| Silver | 1994 Indianapolis | LM1x |
Niall O'Toole (born 26 March 1970 in Dublin) is an Irish rower. He finished 6th in the men's lightweight coxless four at the 2004 Summer Olympics.