The Tensaw River is a river in Baldwin County, Alabama. It is a distributary of the Mobile River, approximately 41 miles (66 km) long. It is formed as a bayou of the Mobile approximately 6 miles (9.7 km) south of the formation of the Mobile by the confluence of the Tombigbee and Alabama rivers. The Tensaw flows alongside the Mobile and Middle rivers, with the Tensaw being the eastern most flowing river. There are numerous back channels extending off the main channel into Baldwin County. It enters Mobile Bay near Blakeley and Pinto islands and approximately 1.8 miles (2.9 km) east of downtown Mobile.