High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Boardman Township is one of the fourteen townships of Mahoning County, Ohio, United States. The 2000 census found 42,518 people in the township. Large portions of the township constitute the community of Boardman, Ohio, recognized as a census-designated place by the US Census Bureau. According to the United States Census Bureau, the township has a total area of 23.78 square miles (61.56 km²), of which, 23.68 square miles (61.30 km²) of it is land and 0.10 square miles (0.26 km²) of it (0.42%) is water.