Vassar is a city located in Osage County Kansas. Vassar has a 2020 population of 799. Vassar is currently declining at a rate of 0.00% annually and its population has increased by 50.75% since the most recent census, which recorded a population of 530 in 2010. Vassar reached it's highest population of 835 in 2017.
The average household income in Vassar is $75,836 with a poverty rate of 5.38%. The median rental costs in recent years comes to $930 per month, and the median house value is $128,000. The median age in Vassar is 51.5 years, 56 years for males, and 46.9 years for females.