1966 Mr International - IFBB
| Overall Winner Don Peters | |
Tall | |
| 1 | Don Peters (United States) |
| 2 | Fritz Sills |
| 3 | Bill Howard (United States) |
Medium | |
| 1 | Rodolfo Flores |
| 2 | John Balik (United States) |
| 3 | Scott Cooper (United States) |
Short | |
| 1 | Alex Cardenas |
| 2 | Juan Campos |
| 3 | Lonnie Lee Johnson |
Most Muscular | |
| 1 | John Balik |