1946 Belmont Stakes
| Belmont Stakes | |
| Grade I stakes race | |
| Location | Belmont Park Elmont, New York, U.S. |
|---|---|
| Date | June 1, 1946 |
| Distance | 1+1⁄2 mi (12 furlongs; 2,414 m) |
| Winning horse | Assault |
| Winning time | 2:30 4⁄5 |
| Jockey | Warren Mehrtens |
| Trainer | Max Hirsch |
| Owner | King Ranch |
| Conditions | Fast |
| Surface | Dirt |
The 1946 Belmont Stakes was the 78th running of the Belmont Stakes. It was the 40th Belmont Stakes held at Belmont Park in Elmont, New York and was held on June 1, 1946. With a field of three horses, Assault, the winner of that year's Kentucky Derby and Preakness Stakes won the 1 1⁄2–mile race (12 f; 2.4 km) by 3 lengths over Natchez.
With the win, Assault became the seventh Triple Crown champion.