State
County
Land Area
3.8 sq mi
Density
3,417.60/sq mi
2020 Growth Rate
-0.69%
Growth Since 2010
-2.11%
Rank in State
Rank in Country
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.
According to the most recent ACS, the racial composition of San Marino was:
| Race | Population | Percentage |
|---|---|---|
| Asian | 7,979 | 60.47% |
| White | 4,157 | 31.51% |
| Two or More Races | 406 | 3.08% |
| Some Other Race | 379 | 2.87% |
| Black or African American | 246 | 1.86% |
| Native Hawaiian and Other Pacific Islander | 27 | 0.20% |
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 4,487 | 2.92 | 86.1 |
| Married | 3,202 | 3.23 | 88.1 |
| Non Family | 628 | 1.24 | 88.4 |
| Female | 419 | 2.83 | 71.8 |
| Male | 238 | 3.23 | 79 |
3.14
Average Family Size
2.92
Average Household Size
| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 122 | 1.26% |
| 9th to 12th Grade | 90 | 0.93% |
| High School Graduate | 545 | 5.63% |
| Some College | 1,154 | 11.92% |
| Associates Degree | 205 | 2.12% |
| Bachelors Degree | 3,724 | 38.47% |
| Graduate Degree | 3,840 | 39.67% |
| Name | Total | High School | Bachelors |
|---|---|---|---|
| Asian | 5,854 | 5,712 | 4,649 |
| White | 2,849 | 2,821 | 2,425 |
| Hispanic | 695 | 658 | 377 |
| Other Race | 361 | 361 | 252 |
| Multiple Races | 134 | 134 | 72 |
| Black | 131 | 126 | 14 |
| Islander | 27 | 27 | 27 |
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%.
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.
| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| Asian | 7,955 | 434 | 5.46% |
| White | 3,736 | 321 | 8.59% |
| Hispanic | 825 | 101 | 12.24% |
| Other | 379 | 82 | 21.64% |
| Black | 246 | 26 | 10.57% |
6.70%
Overall Poverty Rate
5.48%
Male Poverty Rate
7.88%
Female Poverty Rate
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%.
63.2%
Overall Marriage Rate
63.8%
Male Marriage Rate
62.7%
Female Marriage Rate
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.
| Name | Veterans | % of Total |
|---|---|---|
| White | 170 | 5.16% |
| Asian | 62 | 1.00% |
| Hispanic | 19 | 2.51% |
| Black | 19 | 12.75% |
0.00%
Veteran Poverty Rate
29.08%
Veteran Disability Rate
55.5%
Labor Force Participation
54.5%
Employment Rate
1.8%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
58.09%
Native Born
41.91%
Foreign Born
10.00%
Non Citizen
31.92%
Naturalized
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.
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2021 | 12,870 | -89 | -0.69% |
| 2020 | 12,959 | -89 | -0.68% |
| 2019 | 13,048 | -89 | -0.68% |
| 2018 | 13,137 | -107 | -0.81% |
| 2017 | 13,244 | -47 | -0.35% |
| 2016 | 13,291 | -17 | -0.13% |
| 2015 | 13,308 | 45 | 0.34% |
| 2014 | 13,263 | 28 | 0.21% |
| 2013 | 13,235 | 43 | 0.33% |
| 2012 | 13,192 | 37 | 0.28% |
| 2011 | 13,155 | 51 | 0.39% |
| 2010 | 13,104 | 159 | 0.12% |
| 2000 | 12,945 | -14 | -0.01% |
| 1990 | 12,959 | -348 | -0.26% |
| 1980 | 13,307 | -870 | -0.63% |
| 1970 | 14,177 | 519 | 0.37% |
| 1960 | 13,658 | 2,428 | 1.98% |
| 1950 | 11,230 | 3,055 | 3.23% |
| 1940 | 8,175 | 4,445 | 8.16% |
| 1930 | 3,730 | 3,146 | 20.37% |
| 1920 | 584 | 0.00% |