San Marino, California Population 2021

12,870
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San Marino is a city located in California. With a 2020 population of 12,870, it is the 344th largest city in California and the 2580th largest city in the United States. San Marino is currently declining at a rate of -0.69% annually and its population has decreased by -2.11% since the most recent census, which recorded a population of 13,147 in 2010. San Marino reached it's highest population of 14,177 in 1970. Spanning over 4 miles, San Marino has a population density of 3,418 people per square mile.

The average household income in San Marino is $232,829 with a poverty rate of 6.70%. The median rental costs in recent years comes to $3,293 per month, and the median house value is $2.00 Mn. The median age in San Marino is 46.9 years, 44.7 years for males, and 48.3 years for females. For every 100 females there are 96.5 males.

San Marino Demographics

According to the most recent ACS, the racial composition of San Marino was:

  • Asian: 60.47%
  • White: 31.51%
  • Two or more races: 3.08%
  • Other race: 2.87%
  • Black or African American: 1.86%
  • Native Hawaiian or Pacific Islander: 0.20%
  • Native American: 0.00%
The current population of San Marino, California is 12,870, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 13,137.The last official US Census in 2010 recorded the population at 13,147.

San Marino, California Population 2021

Population by Race

Race Population Percentage
Asian7,97960.47%
White4,15731.51%
Two or More Races4063.08%
Some Other Race3792.87%
Black or African American2461.86%
Native Hawaiian and Other Pacific Islander270.20%
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San Marino Population by Race

San Marino Population Pyramid 2021

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San Marino Median Age

46.9


Total

44.7


Male

48.3


Female

San Marino Adults

There are 10,184 adults, (2,728 of whom are seniors) in San Marino.

San Marino Age Dependency

77

Age Dependency Ratio

36.6

Old Age Dependency Ratio

40.4

Child Dependency Ratio

San Marino Sex Ratio

Female

6,716

50.90%

Male

6,478

49.10%

San Marino Population by Age

San Marino Renter vs Owner Occupied by Household Type

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San Marino Household Types

Type Owner Renter
Non Family88.4%11.6%
Married88.1%11.9%
All86.1%13.9%
Male79%21%
Female71.8%28.2%

86.1%

Rate of Home Ownership

San Marino Households and Families

Type Count Average Size Owned
All4,4872.9286.1
Married3,2023.2388.1
Non Family6281.2488.4
Female4192.8371.8
Male2383.2379

3.14

Average Family Size

2.92

Average Household Size

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San Marino Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1221.26%
9th to 12th Grade900.93%
High School Graduate5455.63%
Some College1,15411.92%
Associates Degree2052.12%
Bachelors Degree3,72438.47%
Graduate Degree3,84039.67%
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San Marino Educational Attainment by Sex (over 25)

San Marino Educational Attainment by Race

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Name Total High School Bachelors
Asian5,8545,7124,649
White2,8492,8212,425
Hispanic695658377
Other Race361361252
Multiple Races13413472
Black13112614
Islander272727

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among islander people with a rate of 100.00%.

San Marino Educational Attainment by Race

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Name Average Male Female
Overall$91,630$111,917$61,148
Less Than High School$$$
High School Grad$41,875$45,100$
Some College$41,250$63,375$39,286
Bachelors Degree$66,518$108,710$46,531
Graduate Degree$127,100$161,179$105,161

$91,630

Average Earnings

$111,917

Average Male

$61,148

Average Female

San Marino Earnings by Educational Attainment

San Marino Language by Age

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San Marino Language

47.51% of San Marino residents speak only English, while 52.49% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 43.70% of the population.

San Marino Language

San Marino Poverty by Race

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Name Total In Poverty Poverty Rate
Asian7,9554345.46%
White3,7363218.59%
Hispanic82510112.24%
Other3798221.64%
Black2462610.57%

6.70%

Overall Poverty Rate

5.48%

Male Poverty Rate

7.88%

Female Poverty Rate

Poverty in San Marino

The race most likely to be in poverty in San Marino is Other, with 21.64% below the poverty level.

The race least likely to be in poverty in San Marino is Asian, with 5.46% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.20%. Among those working part-time, it was 5.90%, and for those that did not work, the poverty rate was 11.65%.

San Marino Poverty

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Name Poverty
Less Than High School13.21%
High School7.34%
Bachelors or Greater6.52%
Some College2.21%

San Marino Poverty Rate by Education

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Name Poverty
Male Unemployed21.67%
Female Employed8.73%
Male Employed0.60%
Female Unemployed0.00%

San Marino Poverty Rate by Employment Status and Sex

San Marino Income by Household Type

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Name Median Mean
Households$166,607$232,829
Families$183,934$252,501
Married Families$199,881-
Non Families$56,410$104,877
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Income by Household Type

San Marino Marital Status

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Marriage Rates

63.2%

Overall Marriage Rate

63.8%

Male Marriage Rate

62.7%

Female Marriage Rate

San Marino Married by Age and Sex

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San Marino Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 55-64.

San Marino Marital Status by Race

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San Marino Marital Status

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251

Number of Veterans

251

Male Veterans

Female Veterans

War Veterans
Vietnam111
World War II50
Korea29
Second Gulf War2
First Gulf War

San Marino Veterans by War

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Age Group Veterans
75+136
65 to 7499
55 to 6414
35 to 542
18 to 34

San Marino Veterans by Age

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Name Veterans % of Total
White1705.16%
Asian621.00%
Hispanic192.51%
Black1912.75%

San Marino Veterans by Race

San Marino Veterans by Education

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0.00%

Veteran Poverty Rate

29.08%

Veteran Disability Rate

San Marino Veterans by Education

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55.5%

Labor Force Participation

54.5%

Employment Rate

1.8%

Unemployment Rate

San Marino Employment by Age

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San Marino Employment by Race

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San Marino Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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44.93%

Born in California

58.09%

Native Born

41.91%

Foreign Born

10.00%

Non Citizen

31.92%

Naturalized

Place of Birth

58.09% of San Marino residents were born in the United States, with 44.93% having been born in California. 10.00% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

San Marino Place of Birth

Year Population Growth Annual Growth Rate
202112,870-89-0.69%
202012,959-89-0.68%
201913,048-89-0.68%
201813,137-107-0.81%
201713,244-47-0.35%
201613,291-17-0.13%
201513,308450.34%
201413,263280.21%
201313,235430.33%
201213,192370.28%
201113,155510.39%
201013,1041590.12%
200012,945-14-0.01%
199012,959-348-0.26%
198013,307-870-0.63%
197014,1775190.37%
196013,6582,4281.98%
195011,2303,0553.23%
19408,1754,4458.16%
19303,7303,14620.37%
19205840.00%

San Marino Population by Year