Port St. John is a city located in Florida. Port St. John has a 2020 population of 11,729. Port St. John is currently declining at a rate of 0.00% annually and its population has decreased by -4.39% since the most recent census, which recorded a population of 12,267 in 2010. Port St. John reached it's highest population of 12,912 in 2011.
The average household income in Port St. John is $70,027 with a poverty rate of 11.63%. The median rental costs in recent years comes to $1,078 per month, and the median house value is $131,700. The median age in Port St. John is 43.5 years, 40.9 years for males, and 44.8 years for females. For every 100 females there are 102.0 males.