The Paw Paw River is located in the U.S. state of Michigan in the southwest portion of the lower peninsula. It is formed by the confluence of the north and south branches at 42°15′17″N 85°55′36″W in Waverly Township in the northeast of Van Buren County. It flows approximately 61.8 miles (99.5 km) through Van Buren County and Berrien County until joining the St. Joseph River just above its mouth on Lake Michigan at Benton Harbor.