Dalzell is a census-designated place (CDP) in Sumter County, South Carolina, United States. The population was 3,175 at the 2020 census. It is included in the Sumter, South Carolina Metropolitan Statistical Area.

Orange Grove and St. Philip's Episcopal Church, Bradford Springs are listed on the National Register of Historic Places.

Dalzell is located at 34°1′11″N 80°25′47″W / 34.01972°N 80.42972°W / 34.01972; -80.42972 (34.019811, -80.429780).

According to the United States Census Bureau, the CDP has a total area of 6.9 square miles (18 km), of which 6.8 square miles (18 km) is land and 0.1 square miles (0.26 km) (0.72%) is water.

Historical population

Census	Pop.	Note	%±
2020	3,175		—
U.S. Decennial Census

As of the census of 2000, there were 2,260 people, 805 households, and 622 families residing in the CDP. The population density was 329.7 inhabitants per square mile (127.3/km). There were 895 housing units at an average density of 130.6 per square mile (50.4/km). The racial makeup of the CDP was 61.11% Caucasian, 33.98% African American, 0.53% Native American, 1.11% Asian, 0.04% Pacific Islander, 1.46% from other races, and 1.77% from two or more races. Hispanic or Latino of any race were 3.27% of the population.

There were 805 households, out of which 45.1% had children under the age of 18 living with them, 56.0% were married couples living together, 16.4% had a female householder with no husband present, and 22.7% were non-families. 19.1% of all households were made up of individuals, and 5.1% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.20.

In the CDP, the population was spread out, with 32.5% under the age of 18, 8.9% from 18 to 24, 34.5% from 25 to 44, 17.7% from 45 to 64, and 6.5% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 94.8 males. For every 100 females age 18 and over, there were 91.9 males.

The median income for a household in the CDP was $40,750, and the median income for a family was $41,979. Males had a median income of $29,006 versus $22,000 for females. The per capita income for the CDP was $15,124. About 12.0% of families and 14.9% of the population were below the poverty line, including 24.3% of those under age 18 and 4.0% of those age 65 or over.

All areas in the county are in the Sumter County Consolidated School District.

• Joseph (Jusef Ben Ali) Benenhaley (1753-1823) was the progenitor of the Turkish Community of Sumter.
• Bill Pinkney - American singer and original member of The Drifters most known for his rendition of "White Christmas."
• Ray Allen - NBA player and member of the Naismith Memorial Basketball Hall of Fame
• Ja Morant - All Star Guard for the Memphis Grizzlies, selected as the second overall pick in the 2019 NBA draft.