 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.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.