Major Swamps and Wetlands in Michigan

Michigan is a wetland-rich state — over 5.5 million acres of wetlands remain, including extensive swamps, marshes, and bogs, especially in the Upper Peninsula.

Notable Swamp Systems

• Sylvania Wilderness Area (UP) – 18,000+ acres of old-growth forest and swamp in Ottawa National Forest.
• Seney National Wildlife Refuge (UP) – 95,000+ acres of managed wetlands, including vast swamp forests, critical for waterfowl.
• Muskegon State Game Area (Lower Peninsula) – 10,000+ acres with swamp, marsh, and floodplain habitats.
• St. Clair Flats / St. Clair River Delta (Lake St. Clair) – One of North America's largest freshwater deltas, rich in swamp and marsh ecosystems.
• Tahquamenon Swamp (UP) – Headwaters of the Tahquamenon River; vast coniferous swamp complex.

These areas are vital for biodiversity, flood control, water filtration, and carbon storage. Many are publicly accessible for hiking, birding, and paddling.