Duncan is located in South Carolina. Duncan, South Carolina has a population of 4,675. Duncan is more family-centric than the surrounding county with 39% households with children. The county percentage for households with children is 29%.
The median household income in Duncan, South Carolina is $48,351. The median household income for the surrounding county is $54,424 compared to the national median of $66,222. The median age of people living in Duncan is 35.7 years.
The average high temperature in July is 88.8 degrees, with an average low temperature in January of 31.4 degrees. The annual precipitation is 50.24.