New Hanover Township is a township in Montgomery County, Pennsylvania, United States. The population was 10,939 at the 2010 census. New Hanover Township is a portion of the original Hanover Township. According to the United States Census Bureau, the township has a total area of 21.6 square miles, all land. It consists mainly of rol…New Hanover Township is a township in Montgomery County, Pennsylvania, United States. The population was 10,939 at the 2010 census. New Hanover Township is a portion of the original Hanover Township. According to the United States Census Bureau, the township has a total area of 21.6 square miles, all land. It consists mainly of rolling hills and valleys and is drained by the Schuylkill River mostly via the Perkiomen Creek.