Population
Population
topographic
Population

Alameda County

1,682,353
Total Population in 2020
In 2020, Alameda County was home to 1,682,353 people. Residents were predominantly working age, while those under 18 were a larger segment of the county than those 65 and older. The population was diverse, with no racial group in the majority.

Most Populous Demographics

CategoryDemographicTotalPercentage
Age18-641,097,90565%
SexFemale857,92751%
Race and Hispanic or LatinoAsian (Not Hispanic or Latino)540,51132%

Age

37.7
Median Age
In 2020, Alameda County's population was predominantly working-age adults, while those under age 18 were a moderately larger share of the county than those 65 and older. Looking at 10-year age ranges, 30-39 was the largest group.

Population by Age Range

070k140k210k280k0-910-1920-2930-3940-4950-5960-6970-7980+11%12%14%17%14%13%10%6%3%
070k140k210k280k11%12%14%17%14%13%10%6%3%0-910-1920-2930-3940-4950-5960-6970-7980+
/View Population by Age Range dynamic table

Population by Age Group

65%18-64
    343,965
    Under 18
    1,097,905
    18-64
    240,483
    65 and over
/View Population by Age Group dynamic table

Table: Population by Age Range

Age RangePopulation in Alameda County
TotalPercentage
0-9185,71211%
10-19203,12312%
20-29233,73114%
30-39279,40917%
40-49233,36614%
50-59211,34113%
60-69174,68610%
70-79105,3716%
80+55,6143%

Table: Population by Age Group

Age GroupPopulation in Alameda County
TotalPercentage
Under 18343,96520%
18-641,097,90565%
65 and over240,48314%
* For both charts above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P12 Sex by Age for Selected Age Categories.

Sex and Age

In 2020, females outnumbered males by a moderate amount in Alameda County. Females 30-39 were the largest group by age, followed by males 30-39 and females 40-49. The biggest gap was in the 80-and-older age group, where females were the larger share.

Population by Sex

51%Female
    824,426
    Male
    857,927
    Female
/View Population by Sex dynamic table

Population by Sex and Age

040k80k120k160k0-910-1920-2930-3940-4950-5960-6970-7980+94,835103,635116,883137,367115,333103,75383,19947,56321,85890,87799,488116,848142,042118,033107,58891,48757,80833,756
040k80k120k160k0-910-1920-2930-3940-4950-5960-6970-7980+94,835103,635116,883137,367115,333103,75383,19947,56321,85890,87799,488116,848142,042118,033107,58891,48757,80833,756
160k120k80k40k040k80k120k160k0-910-1920-2930-3940-4950-5960-6970-7980+94,835103,635116,883137,367115,333103,75383,19947,56321,85890,87799,488116,848142,042118,033107,58891,48757,80833,756
/View Population by Sex and Age dynamic table
Male
Female

Table: Population by Sex

SexAlameda County
TotalPercentage
Male824,42649%
Female857,92751%

Table: Population by Sex and Age

Sex and AgeAlameda County
TotalPercentage
Male824,42649%
Male: 0-994,8356%
Male: 10-19103,6356%
Male: 20-29116,8837%
Male: 30-39137,3678%
Male: 40-49115,3337%
Male: 50-59103,7536%
Male: 60-6983,1995%
Male: 70-7947,5633%
Male: 80+21,8581%
Female857,92751%
Female: 0-990,8775%
Female: 10-1999,4886%
Female: 20-29116,8487%
Female: 30-39142,0428%
Female: 40-49118,0337%
Female: 50-59107,5886%
Female: 60-6991,4875%
Female: 70-7957,8083%
Female: 80+33,7562%
* For both charts above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P12 Sex by Age for Selected Age Categories.

Race and Hispanic or Latino

32%
Asian (Not Hispanic or Latino)
In 2020, Alameda County had a diverse population with no race/ethnicity being a majority. Asian and white people were the largest groups in the county, while Hispanic and Black residents were the next biggest segments of the population.

Population by Race and Hispanic or Latino

0150k300k450k600kWhite*Black or African American*American Indian / Alaska Native*Asian*Native Hawaiian / Pacific Islander*Other / Multi-racial*Hispanic or Latino (any race)28%9%<1%32%<1%6%23%
0150k300k450k600kWhite*Black or African American*American Indian / Alaska Native*Asian*Native Hawaiian / Pacific Islander*Other / Multi-racial*Hispanic or Latino (any race)28%9%<1%32%<1%6%23%
0150k300k450k600kWhite*Black or African American*American Indian / Alaska Native*Asian*Native Hawaiian / Pacific Islander*Other / Multi-racial*Hispanic or Latino (any race)28%9%<1%32%<1%6%23%
/View Population by Race and Hispanic or Latino dynamic table

Table: Population by Race and Hispanic or Latino

Race and Hispanic or LatinoPopulation in Alameda County
TotalPercentage
White472,27728%
Black or African American159,4999%
American Indian / Alaska Native4,131<1%
Asian540,51132%
Native Hawaiian / Pacific Islander13,209<1%
Other / Multi-racial98,9776%
Hispanic or Latino (any race)393,74923%
* Categorized as Not Hispanic. This means that all the racial groups marked with an asterisk — White, Black or African American, American Indian / Alaska Native, Asian, Native Hawaiian / Pacific Islander, and Other / Multi-racial — do not include individuals who identify as Hispanic or Latino. The "Hispanic or Latino (any race)" category is separate, as Hispanic/Latino is considered an ethnicity rather than a racial category. For the chart above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P5 Hispanic or Latino Origin by Race.