Johns Island is located in South Carolina. Johns Island, South Carolina has a population of 21,990. Johns Island is less family-centric than the surrounding county with 20.81% of the households containing married families with children. The county average for households married with children is 28.39%.
The median household income in Johns Island, South Carolina is $94,298. The median household income for the surrounding county is $70,807 compared to the national median of $69,021. The median age of people living in Johns Island is 50.2 years.
The average high temperature in July is 89.8 degrees, with an average low temperature in January of 39.3 degrees. The average rainfall is approximately 48.3 inches per year, with 0.4 inches of snow per year.
