Overview
          28,109
                  Total Population
                40.2
                  Median age
                49.07%
                  Female population %
                103.8:100
                  Gender ratio (M:F)
                35-39 years
                  Largest age group
                50.3
                  Total dependency ratio
                White
                  Largest racial group
                3,401
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Belmont's population is old compared to the rest of the country:
- The median age in Belmont is 40.2, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Belmont's population under 18 was 23.50%, compared to the 22.51% nationwide.
 - Belmont's elderly or the senior population (over 65 age) was 14.68% as compared to 16.04% nationwide.
 - Of the total population in Belmont, 18.78% were under the age of 15, 14.38% aged 15 to 29, 52.17% aged 30 to 64, 12.07% aged 65 to 84, and 2.60% were 85 years of age and older.
 
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Gender
There are 525 less females than males in Belmont:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.07% females and 50.93% males in Belmont, CA.
 - The Belmont, CA gender ratio is 103.8:100 i.e. 103.8 men to 100 women (1.038).
 - For male population, the largest age group is 30-34 years with a population of 1,184.
 - For the female population, the largest age group is 35-39 years with a population of 1,380.
 
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Race / Ethnicity
Belmont's population has become increasingly diverse:
- Racial distribution of Belmont population: 54.59% are White, 1.23% are Black or African American, 0.17% are American Indian and Alaska Native, 29.90% are Asian, 1.38% are Native Hawaiian and other Pacific Islander, 5.05% are some other race and 7.68% are multiracial.
 - Belmont's racial breakdown clearly shows that there is an absolute majority of White population in the city.
 - By ethnicity, 3,401 is Hispanic or Latino (of any race), and 24,708 (87.90% of the total population) is Non-Hispanic.
 - The largest racial group in Belmont is White with a population of 15,346 (54.59% of the total population).
 
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Year by year
Belmont's population has already reached its peak and is showing a trend of decline:
- The peak population was 28,234 in the year 2020
 - From 2000 to 2010, Belmont's population increased by 784 (3.12%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Belmont's population increased by 2,301 (8.87%), 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, Belmont's population was lowest in year 2004 at 24,348.
 
Read more about Belmont, 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)