Lenox Township is a civil township of Macomb County in the U.S. state of Michigan. As of the 2020 census, the population was 12,119, up from 10,470 in 2010. Lenox Township is in northeastern Macomb County and is bordered to the east by St. Clair Township. The city of Richmond borders the township to the northeast, and the village of New Haven is in the …Lenox Township is a civil township of Macomb County in the U.S. state of Michigan. As of the 2020 census, the population was 12,119, up from 10,470 in 2010. Lenox Township is in northeastern Macomb County and is bordered to the east by St. Clair Township. The city of Richmond borders the township to the northeast, and the village of New Haven is in the south. According to the U.S. Census Bureau, the township has a total area of 38.9 square miles, of which 0.2 square miles, or 0.43%, are water.