Lenawee County is a county located in the U.S. state of Michigan. As of the 2020 United States Census, the population was 99,423. The county seat is Adrian. The county was created in 1822, from territory partitioned from Monroe County. Its governing structure was organized in 1826.
Lenawee County comprises the Adrian, MI Micropolitan Statistical Area. It is served by the Toledo Media market. Lenawee County is home to the Potawatomi, Ottawa, Chippewa, Iroquois, Miami, Sauk, Fox, Mascoutens and Huron tribes.
