Ira Township is a township located in St. Clair County in the U.S. state of Michigan. As of the 2000 census, the township had a total population of 6,966.
According to the United States Census Bureau, the township has a total area of 55.9 km2 (21.6 mi2). 43.9 km2 (17.0 mi2) of it is land and 12.0 km2 (4.6 mi2) of it is water. The total area is 21.42% water.