Kangaroo Lake is the largest inland lake in Door County, Wisconsin, United States. It is located in the towns of Baileys Harbor and Jacksonport, and is the main feature of Kangaroo Lake State Natural Area. The lake, located a half mile from Lake Michigan, is fed by Piel Creek and surrounded by a lowland marsh. The bottom of the lake is lined with marl. Many types of fish can be found in the lake. The surrounding area is a tourist destination.