In 1990, South Gate was one of ten U.S. communities to receive the All-America City Award from the National Civic League.
The census of 2000 recorded 96, 375 people, 23,213 households, and 20, 063 families residing in the city, with a population density of 13,084.6/sq mi (5,052.0/km²). There are 24,269 housing units at an average density of 1,271.4/km² (3,294.9/mi²). The racial makeup of the city was the following:
There are 23,213 households out of which 58.2% have children under the age of 18 living with them, 59.6% are married couples living together, 18.4% have a female householder with no husband present, and 13.6% are non-families. 10.4% of all households are made up of individuals and 4.8% have someone living alone who is 65 years of age or older. The average household size is 4.15 and the average family size is 4.37.
In the city the population is spread out with 35.6% under the age of 18, 12.5% from 18 to 24, 31.6% from 25 to 44, 14.9% from 45 to 64, and 5.4% who are 65 years of age or older. The median age is 26 years. For every 100 females there are 98.3 males. For every 100 females age 18 and over, there are 95.5 males.
The median income for a household in the city is $35,695, and the median income for a family is $35,789. Males have a median income of $25,350 versus $19,978 for females. The per capita income for the city is $10,602. 19.2% of the population and 17.4% of families are below the poverty line. Out of the total population, 24.2% of those under the age of 18 and 12.0% of those 65 and older are living below the poverty line.
Religion
58.08% of the people in South Gate, CA are religious, meaning they affiliate with a religion. 39.99% are Catholic; 6.75% are Protestant; 1.04% are LDS; 3.33% are another Christian faith; 5.93% in South Gate, CA are Jewish; 0.07% are an eastern faith; 0.98% affilite with Islam.
The South Gate area was inhabited by the Gabrielino/Tongva Indians before development by Spanish ranchers.
South Gate developed during the 1920s and 1930s as an industrial city (primarily in "metal-bashing" industries) and its blue-collar community was predominantly non-Hispanic white.
During the 1940s and 1950s, South Gate was one of the most fiercely segregationist cities in Southern California; gangs of white youths were known to prowl the streets looking for blacks who dared to cross over from neighboring Watts. One of the most infamous clubs of the area at that time was the Spook Hunters.
The population reached some 55,000 by 1964.
The next year South Gate began to change. In August 1965, the Watts riots erupted. Watts was virtually 100 percent black, and South Gate, immediately to the east of Watts, was nearly 100 percent white. Although the rioters were mostly confined to black areas of south-central Los Angeles and did not cross the line into South Gate, younger whites in South Gate started to look elsewhere to buy their first houses. As the white population of South Gate began to decline, the Mexican population, which earlier had established a foothold, began to increase.
Since the 1970s, South Gate has had a large Hispanic community, which became dominant in the 1990s as working-class Hispanics and immigrant Latin American families filled the vacuum left by white flight.