Editing San Marino, California (section)

===2020===
{| class="wikitable" style="text-align:center;"
|+'''San Marino city, California – Racial and ethnic composition'''<br><small>{{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}}</small>
!Race / Ethnicity <small>(''NH = Non-Hispanic'')</small>
!Pop 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – San Marino city, California|url=https://data.census.gov/table?g=160XX00US0668224&tid=DECENNIALSF12000.P004|website=[[United States Census Bureau]] |access-date= }}</ref>
!Pop 2010<ref name=2010CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – San Marino city, California|url=https://data.census.gov/cedsci/table?q=p2&g=160XX00US0668224&tid=DECENNIALPL2010.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!{{partial|Pop 2020}}<ref name=2020CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – San Marino city, California |url=https://data.census.gov/cedsci/table?q=p2&g=160XX00US0668224&tid=DECENNIALPL2020.P2|website=[[United States Census Bureau]] |access-date= }}</ref>
!% 2000
!% 2010
!{{partial|% 2020}}
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|5,771
|4,872
|style='background: #ffffe6; |3,469
|44.58%
|37.06%
|style='background: #ffffe6; |27.72%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|29
|53
|style='background: #ffffe6; |58
|0.22%
|0.40%
|style='background: #ffffe6; |0.46%
|-
|[[Native Americans in the United States|Native American]] or [[Alaska Native]] alone (NH)
|0
|1
|style='background: #ffffe6; |4
|0.00%
|0.01%
|style='background: #ffffe6; |0.03%
|-
|[[Asian Americans|Asian]] alone (NH)
|6,271
|7,010
|style='background: #ffffe6; |7,581
|48.44%
|53.32%
|style='background: #ffffe6; |60.58%
|-
|[[Native Hawaiian]] or [[Pacific Islander Americans|Pacific Islander]] alone (NH)
|9
|2
|style='background: #ffffe6; |7
|0.07%
|0.02%
|style='background: #ffffe6; |0.06%
|-
|[[Race and ethnicity in the United States census|Other race]] alone (NH)
|24
|25
|style='background: #ffffe6; |22
|0.19%
|0.19%
|style='background: #ffffe6; |0.18%
|-
|[[Multiracial Americans|Mixed race or Multiracial]] (NH)
|270
|329
|style='background: #ffffe6; |484
|2.09%
|2.50%
|style='background: #ffffe6; |3.87%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|571
|855
|style='background: #ffffe6; |888
|4.41%
|6.50%
|style='background: #ffffe6; |7.10%
|-
|'''Total'''
|'''12,945'''
|'''13,147'''
|style='background: #ffffe6; |'''12,513'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

The [[2020 United States census]]<ref name=":3">{{Cite web |title=Explore Census Data |url=https://data.census.gov/table?g=040XX00US06_160XX00US0668224&d=DEC+Demographic+Profile&tid=DECENNIALDP2020.DP1 |access-date=June 12, 2023 |website=data.census.gov}}</ref> reported that San Marino's population was 12,513 residents. This is a decline from the 2010 census, where the population was 13,147.<ref name=":4" /> [[Asian Americans]] constituted the majority of San Marino residents at 8,061 (64.4%). [[White Americans]] were the second-largest group at 4,484 residents (35.8%). [[African Americans]] were the third-largest group at 109 residents (0.9%). [[Native Americans in the United States|American Indians]] or Native Americans represented 94 residents (0.8%). [[Native Hawaiians]] and [[Pacific Islander]]s represented 92 residents (0.7%). 722 residents responded as '[[Race and ethnicity in the United States census|some other race]]' (5.8%).<ref name=":3" /> 888 residents identified as [[Hispanic or Latino American]] (7.1%).

The largest age demographic were 15-19 year olds, representing 1,064 residents (8.5%). The second-largest age demographic were 55-59 year olds, representing 1,016 residents (8.1%). 9,892 residents (79.1%) were [[Age of majority|18 years old or older]] and 3,519 (28.1%) were over [[Old age|the age of 62]].<ref name=":3" />

According to the 2020 Census, San Marino had a median household income of $174,253, with 9.0% of the population living below the federal poverty line. With a median home price of $2,699,098,<ref>{{cite web |title=Housing in San Marino, CA |url=https://www.berkshirehathawayhs.com/homes-for-sale/CA/San-Marino |website=Berkshire Hathaway |access-date=October 11, 2017 |archive-url=https://web.archive.org/web/20181016130046/https://www.bestplaces.net/housing/city/california/san_marino |archive-date=October 16, 2018 |url-status=live }}</ref> San Marino is one of the most expensive neighborhoods in the Los Angeles area.<ref>[https://www.census.gov/quickfacts/fact/table/sanmarinocitycalifornia,US/INC110221 Unknown]{{Dead link | date=January 2025 | fix-attempted=yes}}</ref><ref>{{cite news |last1=del Giudice |first1=Vincent |last2=Lu |first2=Wei |title=America's 100 Richest Places |url=https://www.bloomberg.com/graphics/2017-hundred-richest-places/ |newspaper=Bloomberg.com |publisher=Bloomberg}}</ref>