Quinton is an unincorporated community and census-designated place (CDP) located within Quinton Township, in Salem County, in the U.S. state of New Jersey. As of the 2010 United States census, the CDP's population was 1,402.
Quinton CDP and Quinton Township are not coextensive, with the CDP covering 3.7% of the of the township as a whole.
According to the United States Census Bureau, Quinton CDP had a total area of 0.908 square miles (2.354 km<sup>2</sup>), including 0.885 square miles (2.293 km<sup>2</sup>) of land and 0.023 square miles (0.061 km<sup>2</sup>) of water (2.57%).
Quinton first appeared as a census designated place in the 2010 U.S. census.
The 2010 United States census counted 588 people, 215 households, and 163 families in the CDP. The population density was . There were 225 housing units at an average density of . The racial makeup was 86.05% (506) White, 6.97% (41) Black or African American, 0.85% (5) Native American, 0.34% (2) Asian, 0.00% (0) Pacific Islander, 0.34% (2) from other races, and 5.44% (32) from two or more races. Hispanic or Latino of any race were 3.06% (18) of the population.
Of the 215 households, 36.3% had children under the age of 18; 54.0% were married couples living together; 14.4% had a female householder with no husband present and 24.2% were non-families. Of all households, 18.6% were made up of individuals and 7.0% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.12.
28.7% of the population were under the age of 18, 5.6% from 18 to 24, 26.5% from 25 to 44, 24.8% from 45 to 64, and 14.3% who were 65 years of age or older. The median age was 37.1 years. For every 100 females, the population had 100.0 males. For every 100 females ages 18 and older there were 94.0 males.