Wayne County is the most populous county in Michigan. As of 2020, the United States Census placed its population at 1,793,561, making it the 19th-most populous county in the United States. The county seat is Detroit. The county was founded in 1796 and organized in 1815. It is one of several U.S. counties named after Revolutionary War-era general Anthony Wayne.
Wayne County was the sixth county in the Northwest Territory, formed August 15, 1796 from portions of territorial Hamilton County, territorial Knox County and unorganized territory. It was named for the U.S. general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, most of the Upper Peninsula, as well as smaller sections that are now part of northern Ohio, Indiana, Illinois and Wisconsin. By proclamation of the Territorial Secretary and Acting Governor, Winthrop Sargent, on August 15, 1796, the boundaries of Wayne County were declared to begin at the mouth of the Cuyahoga River then west to Fort Wayne, then to the southernmost point of Lake Michigan and along the western shore north to the territorial boundary in Lake Superior and then along the territorial boundary through Lake Huron, Lake St. Clair, and Lake Erie back to the starting point. The first division of the county into townships occurred November 1, 1798, into the four townships of Detroit, Hamtramck, Mackinaw, and Sargent. The extent of Wayne county at that time included all the present state of Michigan in addition to parts of Indiana, Ohio, and Wisconsin, so that the townships erected at that time were vastly larger than the corresponding divisions of the present time.
On January 14, 1803, the Governor of Indiana Territory, William Henry Harrison, issued a similar proclamation defining the boundaries as beginning at a point where an east and west line passing through the southernmost extreme of Lake Michigan would intersect a north and south line, passing through the westernmost extreme of the lake, then north to the territorial boundary, then along said boundary line to a point where an east and west line passing through the southerly extreme of Lake Michigan would intersect the same, then along this last mentioned line to the place of beginning. This boundary would include Chicago, Illinois and a sizable strip of Wisconsin along Lake Michigan.
These boundaries would be adjusted as Indiana and Illinois became states and as other counties were formed within Michigan Territory.
Wayne County is home to:
- Belle Isle State Park
- William G. Milliken Outdoor Adventure Center
- Maybury State Park