THE IOSCO COUNTY LAND BRIEF
Land in the
Tawas Lake Plain setting.
Iosco County has 549.5 square miles of land in Michigan. 4 mapped landscape regions meet across Iosco County: Tawas Lake Plain, Mio Plateau, Vanderbilt Moraines, among others.
Glacial hills, till plains, sandy outwash and old lake basins create a varied northern landscape. Conifer and hardwood forests surround many lakes across these glacially shaped uplands.
Regional context: Northern Lakes and Forests ↗ · Regional mapping across the county footprint
Where the landscape changes
Iosco County intersects 4 mapped regional units. The largest mapped shares are:
- Tawas Lake Plain53.6%
- Mio Plateau45.2%
- Vanderbilt Moraines0.7%
- Onaway Moraines0.4%
Finding your parcel within Iosco County
The atlas lists 17 cities, towns, townships, and Census communities associated with Iosco County, including Oscoda charter, Plainfield, Wilber. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Iosco County by land and water
The Census records 1,340.6 square miles of water within Iosco County, or 70.9% of its total area. That share is close to Iosco County’s 70.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Iosco County has 261.4 times the land area of nearby Au Sable CDP (2.1 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Alcona County, Arenac County, Huron County, Ogemaw County, Oscoda County within Michigan. A tract near one of these lines should be matched to the county identifier on its own records.

