| Esan Prefectural Natural Park | |
| Alt Name: | 恵山道立自然公園 |
| Location: | Hokkaidō, Japan |
| Nearest City: | Hakodate |
| Coordinates: | 41.8°N 150°W |
| Area: | 41.16km2 |
| Established: | 1961 |
is a Prefectural Natural Park in southwest Hokkaidō, Japan. Established in 1961, the park is within the municipality of Hakodate on the Oshima Peninsula. The park comprises four main areas, namely coast, forest, and Mounts E and .[1]