Allendale County, South Carolina Demographics 2026

Population Overview

Allendale County is located in South Carolina with a total population of 7,738. It is the 46th most populous county out of 46 in South Carolina.

Age Demographics

The median age in Allendale County is 42.5 years. This is 6% higher than the state median of 40.1 years.

Economy, Income & Housing

The median household income in Allendale County is $31,603. This is 53% lower than the state median of $66,818. Compared to the national median of $78,538, household income here is 60% lower. The poverty rate stands at 26.5%. This is 87% higher than the state poverty rate of 14.2%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 10.8%. This is 117% higher than the state rate of 5.0%. The median home value is $61,600. Housing costs are 74% lower than the state median of $236,700. With a home-value-to-income ratio of just 1.9x, Allendale County is one of the most affordable housing markets in the area. 64.6% of occupied housing units are owner-occupied. This homeownership rate is 9% lower than the state average of 71.4%.

Race & Ethnicity

The largest racial or ethnic group in Allendale County is Black or African American, making up 64.0% of the population. White (non-Hispanic) residents account for 22.6%. The White (non-Hispanic) population (22.6%) is well below the state average of 62.2%. The Black or African American population is significantly higher than the state average (64.0% vs 25.1%). The Asian population (0.3%) is well below the state average of 1.7%.

Education

13.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 58% lower 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 79.6%.