Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 2000 | 13,479 | | — |
|---|
| 2010 | 15,536 | | 15.3% |
|---|
| 2020 | 12,042 | | −22.5% |
|---|
|
Alum Rock first appeared as a census designated place in the 2000 U.S. census. [17]
The 2020 United States census reported that the CDP had a population of 12,042. The population density was 13,857.3 inhabitants per square mile (5,350.3/km2). The racial makeup of the CDP was 16.7% White, 1.4% African American, 3.4% Native American, 19.0% Asian, 0.3% Pacific Islander, 43.3% from other races, and 15.8% from two or more races. Hispanic or Latino of any race were 67.1% of the population. [19]
The census reported that 98.7% of the population lived in households, 0.4% lived in non-institutionalized group quarters, and 1.0% were institutionalized. [19]
There were 2,922 households, out of which 47.1% included children under the age of 18, 53.1% were married-couple households, 7.2% were cohabiting couple households, 24.0% had a female householder with no partner present, and 15.7% had a male householder with no partner present. 14.1% of households were one person, and 5.8% were one person aged 65 or older. The average household size was 4.07. [19] There were 2,332 families (79.8% of all households). [20]
The age distribution was 23.4% under the age of 18, 10.3% aged 18 to 24, 29.1% aged 25 to 44, 25.5% aged 45 to 64, and 11.7% who were 65 years of age or older. The median age was 35.8 years. For every 100 females, there were 103.8 males. [19]
There were 3,029 housing units at an average density of 3,485.6 units per square mile (1,345.8 units/km2), of which 2,922 (96.5%) were occupied. Of these, 62.0% were owner-occupied, and 38.0% were occupied by renters. [19]
In 2023, the US Census Bureau estimated that 45.3% of the population were foreign-born. Of all people aged 5 or older, 27.3% spoke only English at home, 54.6% spoke Spanish, 1.9% spoke other Indo-European languages, 16.0% spoke Asian or Pacific Islander languages, and 0.2% spoke other languages. Of those aged 25 or older, 66.8% were high school graduates and 19.8% had a bachelor's degree. [21]
The median household income was $111,976, and the per capita income was $34,255. About 5.1% of families and 8.7% of the population were below the poverty line. [22]
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