The Raisin River which runs through the village of Manchester is one of four in Washtenaw County. Its name is derived from the dense cluster of wild grapes which lined both banks in the early days. The Raisin River begins in Wheatland township, Hillsdale County and empties in Lake Erie, two and a half miles below Monroe. It is the most serpentine stream in the peninsula. It meanders for some 140 miles, but a direct line from beginning to end would be only sixty miles. It is one of the most important streams in Michigan as it passes through Sharon, Manchester and Bridgewater in Washtenaw County.
The other three rivers are Huron, Grand and Saline in Washtenaw County.