Seabrook, South Carolina Demographics & Population 2026

A note before these figures: with a population of 799, Seabrook's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Seabrook is a small community located in South Carolina, within Beaufort County. The total population is 799. It ranks as the 293rd most populous out of 474 Census-designated places in South Carolina.

Age Demographics

The median age in Seabrook is 54.0 years. This is 34% higher than the state median of 40.2 years. Only 10.1% of residents are under 18, indicating fewer families with children. 11.1% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Seabrook is $63,149. This is 9% lower than the state median of $69,324. It is also 22% lower than the national median of $80,734. The poverty rate stands at 21.3%. This is 51% higher than the state poverty rate of 14.1%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Seabrook, which reflects the size of the sample rather than a labor market without joblessness. 80.5% of occupied housing units are owner-occupied. This homeownership rate is 12% higher than the state average of 71.9%.

Race & Ethnicity

The largest racial or ethnic group in Seabrook is White (non-Hispanic), making up 49.8% of the population. Black or African American residents account for 44.8%. The Black or African American population is significantly higher than the state average (44.8% vs 24.6%).

Education

10.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 67% lower than the state rate of 32.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 89.5%.

Data Sources & Methodology

All demographic data for Seabrook, South Carolina is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against South Carolina state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 474 Census-designated places in South Carolina. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.