Rockville, South Carolina Demographics & Population 2026

A note before these figures: with a population of 121, Rockville'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

Rockville is a small community located in South Carolina, within Charleston County. The total population is 121. It ranks as the 437th most populous out of 474 Census-designated places in South Carolina.

Age Demographics

The median age in Rockville is 51.3 years. This is 28% higher than the state median of 40.2 years. 13.2% 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 Rockville is $82,500. This is 19% higher than the state median of $69,324. It is also 2% higher than the national median of $80,734. The poverty rate stands at 2.5%. This is 82% lower than the state poverty rate of 14.1%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Rockville, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $459,100. Housing costs are 77% higher than the state median of $259,000. The home-value-to-income ratio is 5.6x. 91.4% of occupied housing units are owner-occupied. This homeownership rate is 27% higher than the state average of 71.9%.

Race & Ethnicity

Rockville has a predominantly White (non-Hispanic) population, comprising 92.6% of all residents. Hispanic or Latino residents account for 1.7%. The Hispanic or Latino population (1.7%) is well below the state average of 7.4%.

Education

63.7% of residents aged 25 and older hold a bachelor's degree or higher. This places Rockville in the top 10% of all cities in the state for educational attainment. This is 98% higher 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 98.9%. Notably, 18.7% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Rockville, 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.