Overview
          106,043
                  Total Population
                34.8
                  Median age
                50.75%
                  Female population %
                97.1:100
                  Gender ratio (M:F)
                25-29 years
                  Largest age group
                51.6
                  Total dependency ratio
                White
                  Largest racial group
                28,75
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
El Cajon's population is young compared to the rest of the country:
- The median age in El Cajon is 34.8, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - El Cajon's population under 18 was 25.32%, compared to the 22.51% nationwide.
 - El Cajon's elderly or the senior population (over 65 age) was 12.89% as compared to 16.04% nationwide.
 - Of the total population in El Cajon, 21.13% were under the age of 15, 21.83% aged 15 to 29, 44.15% aged 30 to 64, 11.25% aged 65 to 84, and 1.64% were 85 years of age and older.
 
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Gender
There are 1,581 more females than males in El Cajon:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.75% females and 49.25% males in El Cajon, CA.
 - The El Cajon, CA gender ratio is 97.1:100 i.e. 97.1 men to 100 women (0.971).
 - For male population, the largest age group is 25-29 years with a population of 4,686.
 - For the female population, the largest age group is 35-39 years with a population of 4,493.
 
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Race / Ethnicity
El Cajon's population has become increasingly diverse:
- Racial distribution of El Cajon population: 69.29% are White, 6.98% are Black or African American, 0.39% are American Indian and Alaska Native, 4.51% are Asian, 0.55% are Native Hawaiian and other Pacific Islander, 9.75% are some other race and 8.54% are multiracial.
 - El Cajon's racial breakdown clearly shows that there is an absolute majority of White population in the city.
 - By ethnicity, 28,75 is Hispanic or Latino (of any race), and 77,293 (72.89% of the total population) is Non-Hispanic.
 - The largest racial group in El Cajon is White with a population of 73,476 (69.29% of the total population).
 
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Year by year
El Cajon's population has already reached its peak and is showing a trend of decline:
- The peak population was 106,126 in the year 2020
 - From 2000 to 2010, El Cajon's population increased by 4,778 (5.03%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, El Cajon's population increased by 6,311 (6.32%), 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, El Cajon's population was lowest in year 2006 at 91,614.
 
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References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
 - U.S. Census Bureau Population Estimates Population Estimates Program (PEP)