Tecumseh Township is a civil township of Lenawee County in the U.S. state of Michigan. The population was 2,042 at the 2020 census. The city of Tecumseh is surrounded by three sides by the Township. The township was first organized in 1827.

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.