| Vesijako Strict Nature Reserve | |
| Iucn Category: | Ia |
| Map: | Finland |
| Relief: | 1 |
| Location: | Päijänne Tavastia, Finland |
| Coordinates: | 61.3506°N 25.1069°W |
| Area Km2: | 1 |
| Established: | 1956 |
| Governing Body: | Metsähallitus |
Vesijako Strict Nature Reserve (Finnish: Vesijaon luonnonpuisto) is located in the Päijänne Tavastia region of Finland. This small reserve, near Lake Vesijako with two outlets in different watersheds, is noted for its geological features.