Johns Island is located in South Carolina. Johns Island, South Carolina has a population of 30,181. Johns Island is less family-centric than the surrounding county with 15% households with children. The county percentage for households with children is 23%.
The median household income in Johns Island, South Carolina is $89,174. The median household income for the surrounding county is $70,500 compared to the national median of $66,222. The median age of people living in Johns Island is 44.9 years.
The average high temperature in July is 89.91 degrees, with an average low temperature in January of 39.17 degrees. The annual precipitation is 49.41.