Editing San Marino, California (section)

===2000===
As of the census<ref name="GR2">{{cite web|url=https://www.census.gov|publisher=[[United States Census Bureau]]|access-date=January 31, 2008|title=U.S. Census website}}</ref> of 2000, there were 12,945 people, 4,266 households, and 3,673 families residing in the city. The population density was {{convert|3,430.5|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 4,437 housing units at an average density of {{convert|1,175.8|/mi2|/km2|disp=preunit|units&nbsp;|units|}}. The racial makeup of the city was 51.98% [[White (U.S. Census)|White]], 0.15% [[African American (U.S. Census)|African American]], 0.05% [[Native American (U.S. Census)|Native American]], 47.7% [[Asian (U.S. Census)|Asian]], 0.08% [[Pacific Islander (U.S. Census)|Pacific Islander]], 1.04% from [[Race (United States census)|other races]], and 2.30% from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 3.25% of the population. More than one-third of the city's population, 33.3%, was Chinese.<ref name="US Census Bureau, 2000 Census factsheet">{{cite web|url=http://factfinder.census.gov/servlet/SAFFFacts?_event=Search&geo_id=&_geoContext=&_street=&_county=San+Marino&_cityTown=San+Marino&_state=04000US06&_zip=&_lang=en&_sse=on&pctxt=fph&pgsl=010&show_2003_tab=&redirect=Y|title=US Census Bureau, 2000 Census factsheet|access-date=June 20, 2007|archive-url=https://archive.today/20200212052326/http://factfinder.census.gov/servlet/SAFFFacts?_event=Search&geo_id=&_geoContext=&_street=&_county=San+Marino&_cityTown=San+Marino&_state=04000US06&_zip=&_lang=en&_sse=on&pctxt=fph&pgsl=010&show_2003_tab=&redirect=Y|archive-date=February 12, 2020|url-status=dead}}</ref>

There were 4,266 households, out of which 42% had children under the age of 18 living with them, 75% were married couples living together, 8.6% had a female householder with no husband present, and 13.9% were non-families. Of all households 12% were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older. The average household size was 3.03 and the average family size was 3.29.

In the city, the age distribution of the population showed 26.5% under the age of 18, 6.4% from 18 to 24, 21.5% from 25 to 44, 29.4% from 45 to 64, and 16.2% who were 65 years of age or older. The median age was 43 years (this was older than average age in the U.S.).<ref>{{cite web|url=http://www.muninetguide.com/states/california/municipality/San_Marino.php|title=San Marino, California Demographics - City and State Information - Population and Housing Data|website=muninetguide.com|access-date=March 19, 2018|archive-url=https://web.archive.org/web/20100803005727/http://www.muninetguide.com/states/california/municipality/San_Marino.php|archive-date=August 3, 2010|url-status=live}}</ref> For every 100 females, there were 93.1 males. For every 100 females age 18 and over, there were 89.1 males.

San Marino is one of the county's cities with the highest proportion of residents of Asian ancestry. {{10 Asian neighborhoods in Los Angeles County}}