Summit is a town in Lexington County, South Carolina, United States. The population was 402 at the 2010 census. It is part of the Columbia, South Carolina Metropolitan Statistical Area.

Summit is located at 33°55′28″N 81°25′23″W / 33.92444°N 81.42306°W / 33.92444; -81.42306 (33.924475, -81.423098).

According to the United States Census Bureau, the town has a total area of 1.5 square miles (3.9 km), all land.

Historical population

Census	Pop.	Note	%±
1880	57		—
1910	87		—
1920	89		2.3%
1930	66		−25.8%
1940	73		10.6%
1950	105		43.8%
1960	108		2.9%
1970	130		20.4%
1980	172		32.3%
1990	242		40.7%
2000	219		−9.5%
2010	402		83.6%
2020	423		5.2%
U.S. Decennial Census

As of the census of 2000, there were 219 people, 92 households, and 65 families residing in the town. The population density was 145.3 inhabitants per square mile (56.1/km). There were 103 housing units at an average density of 68.3 per square mile (26.4/km). The racial makeup of the town was 88.13% White, 9.59% African American, 1.83% Native American, and 0.46% from two or more races. Hispanic or Latino of any race were 0.46% of the population.

There were 92 households, out of which 34.8% had children under the age of 18 living with them, 55.4% were married couples living together, 10.9% had a female householder with no husband present, and 28.3% were non-families. 23.9% of all households were made up of individuals, and 6.5% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.83.

In the town, the population was spread out, with 23.3% under the age of 18, 9.1% from 18 to 24, 29.2% from 25 to 44, 27.9% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 92.1 males. For every 100 females age 18 and over, there were 86.7 males.

The median income for a household in the town was $32,083, and the median income for a family was $35,625. Males had a median income of $27,500 versus $20,000 for females. The per capita income for the town was $15,456. About 9.6% of families and 6.3% of the population were below the poverty line, including 5.7% of those under the age of eighteen and none of those 65 or over.