| Fort Stevenson State Park | |
| Photo Width: | 280 |
| Photo Alt: | Signs |
| Map: | North Dakota |
| Map Width: | 280 |
| Relief: | 1 |
| Label: | Fort Stevenson State Park |
| Location: | McLean County, North Dakota, United States |
| Nearest City: | Garrison, North Dakota |
| Coords: | 47.5908°N -101.42°W |
| Area: | 586.48acres |
| Elevation: | 1883feet |
| Established: | 1974 |
| Free Label: | Named for |
| Designation: | North Dakota state park |
| Administrator: | North Dakota Parks and Recreation Department |
Fort Stevenson State Park is a public recreation area located on a peninsula on Lake Sakakawea 4miles south of the community of Garrison in McLean County, North Dakota. The state park's include a partial reconstruction of Fort Stevenson, the 19th-century Missouri River fort from which the park takes its name. The site of the original fort lies about two miles southwest, below the waters of Lake Sakakawea.
The park offers fishing, boating, camping, and picnicking. It has more than eight miles of non-motorized trails for hiking, biking, and cross-country skiing. A half-mile trail winds through the park arboretum. Boaters can rent slips at two marinas. For overnight stays, the park offers cabins and campground.