2020 census As of the
2020 census, the county had a population of 1,682,353. The median age was 37.7 years, 20.4% of residents were under the age of 18, and 14.3% of residents were 65 years of age or older. For every 100 females there were 96.1 males, and for every 100 females age 18 and over there were 94.0 males age 18 and over. The racial makeup of the county was 31.1% White, 9.8%
Black or African American, 1.2%
American Indian and Alaska Native, 32.4%
Asian, 0.8%
Native Hawaiian and
Pacific Islander, 13.3% from some other race, and 11.3% from
two or more races.
Hispanic or Latino residents of any race comprised 23.4% of the population. The 2020 census shows Alameda as having one of the highest Asian percentages and being one of two counties in the continental US, along with neighboring
Santa Clara County, California, to have an Asian plurality - consisting largely of Chinese, Indian and Filipino ancestry. 99.5% of residents lived in urban areas, while 0.5% lived in rural areas. There were 591,636 households in the county, of which 33.0% had children under the age of 18 living with them and 26.5% had a female householder with no spouse or partner present. About 24.1% of all households were made up of individuals and 9.0% had someone living alone who was 65 years of age or older.
2010 census The
2010 United States census reported that Alameda County had a population of 1,510,271. The population density was . The racial makeup of Alameda County was 649,122 (43.0%)
White, 190,451 (12.6%)
African American, 9,799 (0.6%)
Native American, 394,560 (26.1%)
Asian (9.7% Chinese, 5.5% Filipino, 4.8% Indian, 2.0% Vietnamese, 1.2% Korean, 0.8% Japanese, 2.2% Other Asian), 12,802 (0.8%)
Pacific Islander, 162,540 (10.8%) from
other races, and 90,997 (6.0%) from two or more races.
Hispanic or
Latino of any race were 339,889 persons (22.5%): 16.4% Mexican, 0.8% Puerto Rican, 0.2% Cuban, 5.1% Other Hispanic.
2000 census As of the
census of 2000, there were 1,443,741 people, 523,366 households, out of which 32.6% had children under the age of 18 living within them, 47.0%
married couples living together, 13.0% had a female householder with no husband present, and 35.2% were non-families. 26.0% of all households were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.31. In the county, the population was spread out, with 24.6% under the age of 18, 9.6% from 18 to 24, 33.9% from 25 to 44, 21.7% from 45 to 64, and 10.2% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 96.60 males. For every 100 females age 18 and over, there were 94.00 males. The median income for a household in the county was $55,946, and the median income for a family was $65,857 (these figures had risen to $66,430 and $81,341 respectively as of a 2007 estimate). Males had a median income of $47,425 versus $36,921 for females. The
per capita income for the county was $26,680. About 7.7% of families and 11.0% of the population were below the
poverty line, including 13.5% of those under age 18 and 8.1% of those age 65 or over. In 2000, the largest denominational group was the
Catholics (with 306,437 adherents). The largest religious bodies were the
Catholic Church (with 306,437 members) and
Judaism (with 32,500 members). Asian Americans are the largest racial/ethnic group at 33.9% (excluding Asian Hispanics). The Black population peaked in the 1980 Census at 18.4%. Alameda county has the 2nd highest percentage of Black residents in California after
Solano County at 13.4%. White Non-Hispanic Americans are the largest minority group at 23.6% of the population. The largest ancestry group of Hispanics in Alameda County (2018) are of
Mexican descent (72.9% of Hispanics) followed by
Salvadoran descent (5.5% of Hispanics),
Guatemalan descent (3.9%),
Puerto Rican descent (3.4%),
Spaniard descent (2.0%),
Nicaraguan descent (1.7%),
Peruvian descent (1.4%),
Cuban descent (1.2%),
Colombian descent (1.1%), and those of other Hispanic ethnicity or of mixed Hispanic ethnicity (6.9%). ==Crime==