Williamstown is a city located in Massachusetts. Williamstown has a 2020 population of 4,446. Williamstown is currently declining at a rate of 0.00% annually and its population has increased by 2.80% since the most recent census, which recorded a population of 4,325 in 2010. Williamstown reached it's highest population of 4,446 in 2018.
The average household income in Williamstown is $111,244 with a poverty rate of 12.91%. The median rental costs in recent years comes to $1,013 per month, and the median house value is $365,900. The median age in Williamstown is 21.2 years, 21.4 years for males, and 21 years for females. For every 100 females there are 82.4 males.