Austin Lake is a lake located in Kalamazoo County in the U.S. state of Michigan. It is approximately 2.2 miles (3.5 km) long at its greatest length. It has an average depth of about 5 feet (1.5 m), with a maximum depth of just over 11 feet (3.4 m). A boat launch is provided with a (U.S.) $6 daily fee. All watercraft are allowed.