Sullivan's Island town, South Carolina Demographics & Population 2026

Population Overview

Sullivan's Island town is a small community located in South Carolina. The total population is 2,127. It ranks as the 192nd most populous out of 475 cities and towns in South Carolina.

Age Demographics

The median age in Sullivan's Island town is 52.9 years. This is 32% higher than the state median of 40.1 years.

Economy, Income & Housing

The median household income in Sullivan's Island town is $179,614. This is 169% higher than the state median of $66,818. Compared to the national median of $78,538, household income here is 129% higher. The poverty rate stands at 8.3%. This is 41% lower than the state poverty rate of 14.2%. The unemployment rate is 1.7%. This is 65% lower than the state rate of 5.0%. The median home value is $2,000,001. Housing costs are 745% higher than the state median of $236,700. The home-value-to-income ratio of 11.1x suggests that housing affordability is a significant concern for many residents. 84.6% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 71.4%.

Race & Ethnicity

Sullivan's Island town has a predominantly White (non-Hispanic) population, comprising 97.0% of all residents. Hispanic or Latino residents account for 2.1%. The White (non-Hispanic) population is significantly higher than the state average (97.0% vs 62.2%). The Hispanic or Latino population (2.1%) is well below the state average of 7.1%. The Asian population (0.4%) is well below the state average of 1.7%.

Education

87.2% of residents aged 25 and older hold a bachelor's degree or higher. This places Sullivan's Island town in the top 10% of all cities in the state for educational attainment. This is 177% higher than the state rate of 31.5%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 99.9%. Notably, 45.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Sullivan's Island town, South Carolina is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against South Carolina state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 475 Census-designated places in South Carolina. For official data, visit data.census.gov.