Seabrook Island is a city located in South Carolina. With a 2020 population of 1,857, it is the 125th largest city in South Carolina and the 7899th largest city in the United States. Seabrook Island is currently growing at a rate of 0.05% annually and its population has increased by 8.34% since the most recent census, which recorded a population of 1,714 in 2010. Seabrook Island reached it's highest population of 1,862 in 2017. Spanning over 7 miles, Seabrook Island has a population density of 311 people per square mile.
The average household income in Seabrook Island is $155,636 with a poverty rate of 5.61%. The median rental costs in recent years comes to $1,179 per month, and the median house value is $639,500. The median age in Seabrook Island is 67.6 years, 68 years for males, and 66.9 years for females. For every 100 females there are 91.6 males.