San Diego County, CA Population

Overview

3.30 million

Total Population

36.3

Median age

49.39%

Female population %

102.5:100

Gender ratio (M:F)

25-29 years

Largest age group

47.5

Total dependency ratio

White

Largest racial group

1.13 million

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

San Diego County's population is young compared to the rest of the country:

The median age in San Diego County is 36.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
San Diego County's population under 18 was 21.66%, compared to the 22.51% nationwide.
San Diego County's elderly or the senior population (over 65 age) was 14.10% as compared to 16.04% nationwide.
Of the total population in San Diego County, 18.09% were under the age of 15, 21.81% aged 15 to 29, 45.99% aged 30 to 64, 12.30% aged 65 to 84, and 1.80% were 85 years of age and older.

There are 40,011 less females than males in San Diego County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.39% females and 50.61% males in San Diego County, CA.
The San Diego County, CA gender ratio is 102.5:100 i.e. 102.5 men to 100 women (1.025).
For male population, the largest age group is 25-29 years with a population of 141,859.
For the female population, the largest age group is 25-29 years with a population of 128,597.

San Diego County's population has become increasingly diverse:

Racial distribution of San Diego County population: 61.99% are White, 4.90% are Black or African American, 0.80% are American Indian and Alaska Native, 11.96% are Asian, 0.41% are Native Hawaiian and other Pacific Islander, 8.07% are some other race and 11.87% are multiracial.
San Diego County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 1.13 million is Hispanic or Latino (of any race), and 2.16 million (65.68% of the total population) is Non-Hispanic.
The largest racial group in San Diego County is White with a population of 2.04 million (61.99% of the total population).

San Diego County's population has already reached its peak and is showing a trend of decline:

The peak population was 3,332,483 in the year 2018
From 2000 to 2010, San Diego County's population increased by 276,946 (9.80%), as compared to the national growth of 9.63%.
From 2010 to 2020, San Diego County's population increased by 192,785 (6.21%), 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, San Diego County's population was lowest in year 2000 at 2,826,314.