Ronald Lopatni
| Medal record | ||
|---|---|---|
| Men's Water Polo | ||
Competitor for  Yugoslavia
| ||
| Olympic Games | ||
| Gold | 1968 Mexico City | Team Competition |
Ronald Lopatni (born 19 May 1944 in Zagreb) is a Croatian water polo player notable for winning a gold medal in Mexico City in 1968, with the Yugoslavian water polo team.