|Location||Chippewa County, Michigan, United States|
|Nearest city||Raco, Michigan|
|Area||11,870 acres (48.0 km2)|
|Governing body||U.S. Forest Service & Great Lakes Indian Fish & Wildlife Commission|
The wilderness is forested, flat, and rolling, often characterized as a swamp, with elevations ranging from 590 to 890 feet (180 to 270 m). Sculpted by glaciers and an ancient glacial lake, it now contains the 80-acre (32 ha) Sylvester Pond and the 6-acre (2 ha) Delirium Pond, as well as the headwaters of the Pine and Waiska Rivers.
Wildlife predominant in the Delirium Wilderness includes beaver, bobcat, otter, various species of duck, loon, great blue heron, and sandhill crane. Whitetail deer, black bear, and rabbit are also found in the area.