Ida Township is a civil township of Monroe County in the U.S. state of Michigan. The population was 4,783 at the 2020 census. The township was organized in 1837 and named after local civic leader Ida M. Taylor.

Monroe County is a county in the U.S. state of Michigan. As of the 2020 Census, the population was 154,809. The largest city and county seat is Monroe. The county was established as the second county in the Michigan Territory in 1817 and was named for then-President James Monroe. Monroe County is coterminous with the Monroe metropolitan statistical area.