San Diego County Population Charts

According to the most recent San Diego County California demographics data available from the United States Census Bureau released in the American Community Survey in December of 2019, Figure 1 San Diego County shows it has a population of 3,302,833 which is the second most populous of all the counties in the greater San Diego County region. The county with the highest population in the area is Los Angeles County which shows a population of 10,098,052 (approximately 3.1 times bigger). Figure 3 uses the San Diego County population data for a comparison of the population growth/population change estimates from the years 2010 to 2018 and San Diego County California indicates an increase of 207,520 (7%).

The total San Diego County California greater area population percent change for all areas for the years from 2010 to 2018 is shown in Figure 4 and for San Diego County shows it has a population percent change of 6.7% which is the second most population percent change of all the counties in the greater San Diego County region.

Looking at the San Diego County population density (measured as people per square mile) and providing comparisons to both the national and state average population density in Figure 5, San Diego County California shows it has 785 people per square mile which is the third most people per square mile of all other counties in the greater San Diego County region. The next higher in order of population density is Los Angeles County approximately 3.2 times bigger with population density of 2,488. The county with the highest population density in the area is Orange County which shows a people per square mile of 4,001 ( appreciably bigger). Figure 6 provides San Diego County demographics for the overall median age for all people in the region and San Diego County depicts it has an overall median age of all people of 35.6 which is in the mid range of other counties in the greater region. The county with the highest overall median age of all people in the area is Ventura County which shows an age of 37.9 (6.5% larger). The San Diego County California population data for median age broken out by gender for both men versus the median age of women is shown in Figure 7. San Diego County California shows a median age of men about 7.9% smaller as the median age of women.

The next demographic analysis (Figure 8) looks at large generational San Diego County population groups (and can be useful internet research for employment related research or identifying areas with retirees). Key findings in this chart includes that San Diego County California has the smallest proportion of people less than 20 years of age at 24.7% of the total. Second, it has the largest proportion of people between 20 and 29 years old at 16.5% of the total and is ranked #1. Third, it has the largest proportion of people between 30 and 39 years old at 14.6% of the total and is ranked #1.

Figure 9 illustrates the overall diversity breakdown for San Diego County population and ethnicity groups in the area. (note: Hispanic/Latino is broken out separately in the next diagram and also the group denoted as Native ethnicity includes Native American, and Hawaiian and Other Pacific Islander.) San Diego County California has one of the largest proportions of Asian population at 11.8% of the total and is ranked #3. Only #2 Los Angeles County (14.6%), and #1 Orange County (20.1%) are larger. Second, it has the second smallest as measured by people who are white of all the other counties in the local area in order of Other Race population at 11.4% of the total. Figure 10 shows the San Diego County California Hispanic (including non Hispanic whites) population household ethnicity in the region and San Diego County shows it has a people who are Hispanic or Latino of 33.5% which is the smallest in order of people who are Hispanic or Latino of all the other counties in the greater region. Figure 11 compares the ratio of the amount of men to the amount of women and depicts total male population only slightly larger as the total female population.

San Diego County Marital Status and Families Charts

Figure 12 shows the detailed marriage characteristics broken down by %residents who are married, never married, single, divorced, and widowed. San Diego County has the largest proportion of percent divorced at 10% of the total and is ranked #1. Second, it has the smallest proportion of percent widowed at 5% of the total. Figure 14 compares the average household size using the average number of people in a family for San Diego County households. San Diego County depicts it has an average family size of 3.6 which is the smallest as measured by average family size of all the other counties in the local area. The county with the highest average family size in the area is Imperial County which depicts an average family size of 4.7 (30.9% larger).

Figure 15 shows the overall ratio of San Diego County households for families to the total number of San Diego County households and that San Diego County depicts it has a percent of people who are in a family of 67% which is the second smallest when ranked by percent of people who are in a family of all the other counties in the surrounding region. The county with the highest percent of people who are in a family in the area is Imperial County which depicts a families percent of 77% (14.2% larger).

Looking at San Diego County households that are headed by a husband and wife as a percent of all families in Figure 16, San Diego County depicts it has a percent of people in a husband and wife family of 75% which is the third most husband and wife family percent of all other counties in the greater San Diego County region. The county with the highest percent of people in a husband and wife family in the area is Ventura County which depicts a husband and wife family percent of 76% (only about 2.5% larger).

San Diego County Mothers and Children Charts

The next section of charts provide a detailed look at mothers and baby births that occurred over the past 12 months. Figure 18 shows the rate of women aged 15 to 50 years old who have given birth. San Diego County indicates it has a percent of women who gave birth of 5.1% which is in the mid range of other counties in the surrounding region. The county with the highest percent of women who gave birth in the area is Imperial County which depicts a birth rate of 6.0% (18.3% larger). Figure 19 shows the breakdown of the mother's age for all baby births that occurred in the last 12 months and has the percentage of percent of births to mothers aged 15 to 19 less than most other counties in the greater region at 3% of the total. Second, it has less than most other counties in the metropolitan area when ranked by percent of births to mothers aged 20 to 24 at 14% of the total. Third, it has the largest proportion of percent of births to mothers aged 30 to 34 at 32% of the total and is ranked #1. Also, it has the smallest proportion of percent of births to mothers aged 40 to 44 at 4% of the total. In addition, it has the smallest proportion of percent of births to mothers aged 45 to 50 at 2% of the total.

In Figure 20, the demographic data for San Diego County California teenager birth rate is shown (women between the ages of 15 and 19.) San Diego County shows it has a teenager birth rate of 3% which is less than most other counties in the metro area. The county with the highest teenager birth rate in the area is San Bernardino County which shows a births to a teenager of 5% (74.3% larger).

In Figure 21, the percentage of all births in the last 12 months to mothers that were unmarried is shown (unwed mothers.) San Diego County shows it has a percent of unwed women who have given birth of 25% which is the second smallest in order of percent of unwed women who have given birth of all the other counties in the metro area. The county with the highest percent of unwed women who have given birth in the area is San Bernardino County which depicts an unwed mother birth rate of 42% (65.8% larger).

The next chart, Figure 22, shows the percentage of unwed mothers who are also on public assistance. San Diego County depicts it has a percent of unwed women who have given birth and are on public assistance of 2.7% which is less than most other counties in the greater region. The county with the highest percent of unwed women who have given birth and are on public assistance in the area is Imperial County which depicts a percent of unwed women who gave birth and are on public assistance of 4.8% (76.1% larger).

Unwed mothers who have given birth in the last 12 months are also shown broken down by age group in Figure 24. San Diego County California has one of the largest proportions of unwed mothers aged 15 to 19 at 8.6% of the total and is ranked #2. The only larger county being San Bernardino County with 11.3%. Figure 25 shows the comparative demographic rate of unwed mothers who have given birth in the last 12 months are broken down by racial group (including the Hispanic birth rate.) San Diego County California has the percentage of White unwed birth rate the second smallest in order of White unwed birth rate of all the other counties in the local area at 25.0% of the total. Second, it has in the intermediate range of other counties in the metro area as measured by Black unwed birth rate at 38.2% of the total. Third, it has the second smallest as measured by White unwed birth rate of all the other counties in the surrounding region in order of Hispanic unwed birth rate at 38.9% of the total. Also, it has less than most other counties in the metro area in order of Native Hawaiian unwed birth rate at 46.7% of the total.

Figure 26 shows unwed mothers in poverty (based on median household income definition) who have given birth in the last 12 months. San Diego County California has the percentage of unwed births and living below poverty level in the mid range of other counties in the metro area at 38.3% of the total. Second, it has the largest proportion of unwed births and living between 100% and 199% of poverty level at 29.1% of the total and is ranked #1. Third, it has the smallest proportion of unwed births and living at 200%+ above poverty level at 32.7% of the total.

For all births to unwed mothers, Figure 27 breaks down the education level of the mother by less than high school through college and post graduate attainment has the percentage of percent of unwed mothers with less than high school education the second smallest when sorted by percent of unwed mothers with less than high school education of all the other counties in the metropolitan area at 19% of the total. Second, it has the second smallest as measured by percent of unwed mothers with less than high school education of all the other counties in the local area when ranked by percent of unwed mothers who are a high school graduate or equivalent at 31% of the total.

San Diego County Marital Status Charts

The next set of demographic data looks at the marital status for San Diego County households which is useful for internet research. Figure 28 compares the total number of single people in each area. San Diego County shows it has a percent of people who are single for any reason of 51% which is in the mid point range of other counties in the local area. The county with the highest percent of people who are single for any reason in the area is Imperial County which depicts a percent single of 55% (9.0% larger). Comparing percent of people who are single for any reason to the United States average of 50%, San Diego County is only slightly larger. Also, benchmarked against the state of California, percent of people who are single for any reason of 51%, San Diego County is about the same size.

Figure 30 compares the single people in each area broken down by never married, divorced, and widowed. San Diego County California has the percentage of percent never married in the intermediate range of other counties in the local area at 36% of the total. Second, it has the largest proportion of percent divorced at 10% of the total and is ranked #1. Third, it has the smallest proportion of percent widowed at 5% of the total. Figure 31 shows the demographics for the number of single men adults in each area broken out by never married, divorced and widowed. San Diego County California has the largest proportion of men who are divorced at 8% of the total and is ranked #1. Figure 32 shows the number of single women adults in each area broken out by never married, divorced and widowed. San Diego County California has the percentage of women who have never been married in the mid range of other counties in the metro area at 31% of the total. Second, it has the largest proportion of women who are divorced at 12% of the total and is ranked #1.

Figure 33 shows the San Diego County demographics for the ratio of the number of single men between the age of 18 and 65, in each area, broken down by age group for the San Diego County metro area. San Diego County California has the smallest proportion of single men 45 to 49 at 6% of the total.

Figure 34 shows the San Diego County population data for the ratio of the number of single women between the age of 18 and 65, in each area, broken down by age group for the San Diego County metro area. San Diego County California has the percentage of single women 18 to 24 the second smallest in terms of percent of single women 18 to 24 of all the other counties in the area at 28% of the total. Second, it has the largest proportion of single women 25 to 29 at 18% of the total and is ranked #1. Third, it has the smallest proportion of single women 45 to 49 at 7% of the total.

San Diego County Citizenship Demographics Charts

The next section of demographic information provides detailed data San Diego County residents including: immigrants, citizenship, immigration, country of origin, non citizens and more. To start, Figure 35 shows a high level view of citizenship. San Diego County California has the percentage of citizens born In US in the center range of other counties in the local area at 77% of the total. Second, it has less than most other counties in the metro area when ranked by non-citizens at 11% of the total. The next chart (Figure 36) shows for all citizens what the original place of birth was for people who were born in a foreign country and has the smallest proportion of birthplace in this state at 65% of the total. Second, it has the largest proportion of birthplace in northeast US at 8% of the total and is ranked #1. Third, it has the largest proportion of birthplace in the Midwest at 10% of the total and is ranked #1. Also, it has the largest proportion of birthplace in the South at 9% of the total and is ranked #1. In addition, it has the largest proportion of birthplace in West at 6% of the total and is ranked #1.

In Figure 37, the demographic percentage of San Diego County residents who were not born in the United States is shown (i.e. percent foreign born.) San Diego County depicts it has a percent of population who was born in another country of 23.4% which is in the middle range of other counties in the metropolitan area. The county with the highest percent of population who was born in another country in the area is Los Angeles County which shows a percent born outside United States of 34.2% (46.0% larger). Comparing percent of population who was born in another country to the United States average of 13.5%, San Diego County is 73.9% larger. Also, measured against the state of California, percent of population who was born in another country of 26.9%, San Diego County is about 14.8% smaller. Figure 40 provides further information for non citizen age by showing a comparison of the median age for all non citizens immigrants. it has a median age of non citizens of 40.3 which is the second smallest in terms of median age of non citizens of all the other counties in the local area. The county with the highest median age of non citizens in the area is Imperial County which shows a median age of 46.6 (15.6% larger). The next diagram (Figure 41) shows the year of entry that non citizens entered the United States. The year of entry can show the rate of flow at various points of time in the past for when they entered the U.S. it has the largest proportion of non citizens who entered the US after 2010 at 28% of the total and is ranked #1. Second, it has the second smallest in terms of percent of non citizens who entered the US after 2010 of all the other counties in the surrounding region in order of non citizens who entered the US before 1990 at 22% of the total.

For all foreign born people who have gone through naturalization (the process of becoming a legal U.S. resident citizen), Figure 42 shows the year when they became fully naturalized U.S. citizens. has the smallest proportion of people naturalized 1995 to 1999 at 14% of the total.

San Diego County Birthplace Demographic Charts

Figure 43 displays a map of the globe and shows San Diego County demographic information for large regions of the world that people from this place originally came from. San Diego County California has the largest proportion of from Europe at 8% of the total and is ranked #1. Second, it has one of the largest proportions of from Asia at 38% of the total and is ranked #2. The only larger county being Orange County with 48%. Third, it has the largest proportion of from Africa at 2% of the total and is ranked #1. Also, it has the second smallest in terms of percent of people born in Europe of all the other counties in the metro area when sorted by from the Americas at 51% of the total.

Figure 44 categorizes the location for where foreign born people originally come from based on very large continental geographic areas. San Diego County California has the largest proportion of from Europe at 8% of the total and is ranked #1. Second, it has one of the largest proportions of from Asia at 38% of the total and is ranked #2. The only larger county being Orange County with 48%. Third, it has the largest proportion of from Africa at 2% of the total and is ranked #1. Also, it has the second smallest in order of percent of people born in Europe of all the other counties in the area as measured by from the Americas at 51% of the total.

Figure 45 is a table that breaks out all the people who were foreign born by which large geographic region where they were born. San Diego County California has the largest proportion of people who were born in Western Europe at 1.9% of the total and is ranked #1. Second, it has the largest proportion of people who were born in Southern Europe at 1.1% of the total and is ranked #1. Third, it has the largest proportion of people who were born in Eastern Europe at 2.5% of the total and is ranked #1. Also, it has the largest proportion of people who were born in Western Asia at 4.8% of the total and is ranked #1. In addition, it has the largest proportion of people who were born in Eastern Africa at 1.0% of the total and is ranked #1. Furthermore, it has the largest proportion of people who were born in the Middle African Region at 0.2% of the total and is ranked #1. Next it has the largest proportion of people who were born in Southern Africa at 0.3% of the total and is ranked #1.