As of the census of 2000, there were 2,723 people, 561 households, and 521 families residing in the CDP. The population density was 5,804.4 people per square mile (2,236.9/km²). There were 586 housing units at an average density of 1,249.1/sq mi (481.4/km²). The racial makeup of the CDP was 16.12% White, 0.07% African American, 0.81% Native American, 6.06% Asian, 0.22% Pacific Islander, 74.48% from other races, and 2.24% from two or more races. Hispanic or Latino of any race were 91.55% of the population.
There were 561 households out of which 69.3% had children under the age of 18 living with them, 71.3% were married couples living together, 14.4% had a female householder with no husband present, and 7.0% were non-families. 4.8% of all households were made up of individuals and 1.8% had someone living alone who was 65 years of age or older. The average household size was 4.85 and the average family size was 4.93.
In the CDP the population was spread out with 43.5% under the age of 18, 12.1% from 18 to 24, 26.9% from 25 to 44, 13.1% from 45 to 64, and 4.4% who were 65 years of age or older. The median age was 21 years. For every 100 females there were 112.1 males. For every 100 females age 18 and over, there were 111.1 males.
The median income for a household in the CDP was $22,885, and the median income for a family was $23,109. Males had a median income of $20,089 versus $12,500 for females. The per capita income for the CDP was $6,415. About 33.1% of families and 36.9% of the population were below the poverty line, including 46.2% of those under age 18 and 16.1% of those age 65 or over.
In the state legislature Richgrove is located in the 16th Senate District, represented by Democrat Dean Florez, and in the 30th Assembly District, represented by Democrat Nicole Parra. Federally, Richgrove is located in California's 21st congressional district, which has a Cook PVI of R +13 and is represented by Republican Devin Nunes.