Williamstown Real EstateWilliamstown is located in New Jersey. Williamstown, New Jersey has a population of 15,191. Williamstown is less family-centric than the surrounding county with 30.98% of the households containing married families with children. The county average for households married with children is 34.48%. The median household income in Williamstown, New Jersey is $71,303. The median household income for the surrounding county is $81,489 compared to the national median of $57,652. The median age of people living in Williamstown is 41.3 years. Williamstown WeatherThe average high temperature in July is 86.6 degrees, with an average low temperature in January of 24 degrees. The average rainfall is approximately 45.7 inches per year, with 19.5 inches of snow per year. Williamstown MapReal estate near WilliamstownNearby CitiesNearby Cities Homes for Sale |