Geography According to the United States Census Bureau, the town has a total area of , of which are land and are water, comprising 0.92% of the town. New Boston is drained by the South Branch and Middle Branch of the Piscataquog River, except for the town's southeastern corner, which is drained by Joe English Brook, a tributary of Baboosic Brook. The entire town is part of the Merrimack River watershed. Joe English Hill, elevation above sea level and the highest point in the town, is in the south.
Geography According to the United States Census Bureau, the town has a total area of , of which are land and are water, comprising 0.92% of the town. New Boston is drained by the South Branch and Middle Branch of the Piscataquog River except for the town's southeastern corner, which is drained by Joe English Brook, a tributary of Baboosic Br,ook. The entire town is part of the Merrimack River watershed. Joe English Hill, elevation above sea level and the highest point in the town, is in the south.