Overview
31,562
Total Population
45.8
Median age
49.67%
Female population %
101.3:100
Gender ratio (M:F)
50-54 years
Largest age group
63.0
Total dependency ratio
White
Largest racial group
1,829
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Los Altos's population is old compared to the rest of the country:
- The median age in Los Altos is 45.8, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Los Altos's population under 18 was 25.01%, compared to the 22.51% nationwide.
- Los Altos's elderly or the senior population (over 65 age) was 19.05% as compared to 16.04% nationwide.
- Of the total population in Los Altos, 19.59% were under the age of 15, 15.14% aged 15 to 29, 46.22% aged 30 to 64, 16.01% aged 65 to 84, and 3.04% were 85 years of age and older.

Read more about Los Altos, CA population by age ➔
Gender
There are 206 less females than males in Los Altos:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.67% females and 50.33% males in Los Altos, CA.
- The Los Altos, CA gender ratio is 101.3:100 i.e. 101.3 men to 100 women (1.013).
- For male population, the largest age group is 50-54 years with a population of 1,601.
- For the female population, the largest age group is 50-54 years with a population of 1,443.

Read more about Los Altos, CA population by gender ➔
Race / Ethnicity
Los Altos's population has become increasingly diverse:
- Racial distribution of Los Altos population: 57.88% are White, 0.76% are Black or African American, 0.12% are American Indian and Alaska Native, 33.76% are Asian, 1.58% are some other race and 5.91% are multiracial.
- Los Altos's racial breakdown clearly shows that there is an absolute majority of White population in the city.
- By ethnicity, 1,829 is Hispanic or Latino (of any race), and 29,733 (94.21% of the total population) is Non-Hispanic.
- The largest racial group in Los Altos is White with a population of 18,268 (57.88% of the total population).

Read more about Los Altos, CA population by race ➔
Year by year
Los Altos's population has already reached its peak and is showing a trend of decline:
- The peak population was 31,353 in the year 2020
- From 2000 to 2010, Los Altos's population increased by 1,074 (3.83%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Los Altos's population increased by 2,221 (7.62%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Los Altos's population was lowest in year 2004 at 27,181.

Read more about Los Altos, CA population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)