Castalian Springs is a city located in Sumner County Tennessee. Castalian Springs has a 2020 population of 428. Castalian Springs is currently declining at a rate of 0.00% annually and its population has decreased by -23.02% since the most recent census, which recorded a population of 556 in 2010. Castalian Springs reached it's highest population of in .
The average household income in Castalian Springs is $75,919 with a poverty rate of 5.37%. The median rental costs in recent years comes to - per month, and the median house value is $120,000. The median age in Castalian Springs is 46.2 years, 49.6 years for males, and 39 years for females.