As of the census of 2000, there were 1,499 people, 320 households, and 289 families residing in the CDP. The population density was 8,691.4 people per square mile (3,404.5/km²). There were 329 housing units at an average density of 1,907.6/sq mi (747.2/km²). The racial makeup of the CDP was 26.62% White, 0.40% Black or African American, 1.87% Native American, 66.18% from other races, and 4.94% from two or more races. It is noteworthy that 92.73% of the population were Hispanic or Latino of any race.
Kettleman City is predominantly a Spanish-speaking community. At the time of the 2000 census, 93.5% of residents spoke Spanish at home, and 41.0% of this group spoke English "well" or "very well." 6.5% of residents spoke only English at home, and 55.1% spoke English "not well" or "not at all."
There were 320 households out of which 63.1% had children under the age of 18 living with them, 67.2% were married couples living together, 15.3% had a female householder with no husband present, and 9.4% were non-families. 1.6% of all households were made up of individuals and 0.3% had someone living alone who was 65 years of age or older. The average household size was 4.68 and the average family size was 4.59.
In the CDP the population was spread out with 36.3% under the age of 18, 15.6% from 18 to 24, 29.0% from 25 to 44, 14.8% from 45 to 64, and 4.3% who were 65 years of age or older. The median age was 24 years. For every 100 females there were 123.1 males. For every 100 females age 18 and over, there were 125.2 males.
The median income for a household in the CDP was $22,409, and the median income for a family was $21,955. Males had a median income of $16,619 versus $10,179 for females. The per capita income for Kettleman City was only $7,389 - about a third of California's average of $22,711. It is noteworthy that about 38.6% of families and 43.7% of the population were below the poverty line, including 52.7% of those under age 18 and none of those age 65 or over.
Kings Area Rural Transit (KART) operates regularly scheduled fixed route bus service, vanpool service for commuters and Dial-A-Ride (demand response) services throughout Kings County as well as to Fresno.
Amtrak has a bus stop in Kettleman City.