Today williamstown, Williamstown NJ is count around 26 homes for sale at current average listing price of $407,677. Nearby neighborhoods of williamstown are None Available, Amberleigh At The Ar, Colonial Estates, Devonshire, Holiday City, Lafayette Estates, Schoolhouse Gate, Stockton Run, Tall Oaks, Willow Woods. Most of williamstown homes are 3 bedrooms with 2 bathrooms.