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2025 Compare Cities People:
San Marino, CA vs Placentia, CA

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Highlights
- Placentia is 0% more densely populated than San Marino.
- People are 20.3% less likely to be married in Placentia.
- The Median Age is 8.7 years younger in Placentia.
 San Marino, CAPlacentia, CAUnited States
 Population  Unlock51,951329,725,481
 Female Population48.6%  Unlock50.5%
 Male Population51.4%  Unlock49.5%
 Median Age  Unlock36.938.4
 space3
 Population - 201013,102  Unlock309,327,143
 Population - 2000  Unlock46,488285,036,114
 Population - 199012,959  Unlock251,960,433
 Pop. 2000 to Now  Unlock10.8%15.6%
 Pop. 1990 to Now-1.3%  Unlock30.8%
 space4
 Population Density  Unlock7,854.793.4
 Land Area3.8  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 San Marino, CAPlacentia, CAUnited States
 Age 0 to 45.4%  Unlock5.9%
 Age 5 to 9  Unlock6.2%6.1%
 Age 10 to 145.7%  Unlock6.6%
 Age 15 to 17  Unlock4.8%3.9%
 Age 18 to 202.2%  Unlock4.0%
 Age 21 to 24  Unlock6.3%5.2%
 Age 25 to 3410.4%  Unlock13.8%
 Age 35 to 44  Unlock13.0%12.9%
 Age 45 to 5415.8%  Unlock12.6%
 Age 55 to 59  Unlock6.2%6.7%
 Age 60 to 648.0%  Unlock6.3%
 Age 65 to 74  Unlock7.8%9.6%
 Age 75 to 844.9%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
 space1
 Race
 San Marino, CAPlacentia, CAUnited States
 White23.7%  Unlock59.4%
 Black  Unlock2.5%12.2%
 Asian66.5%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.2%  Unlock0.2%
 Other  Unlock0.5%0.4%
 Two or More Races2.3%  Unlock3.2%
 Hispanic  Unlock39.1%18.4%
 space2
 Marriage & Family
 San Marino, CAPlacentia, CAUnited States
 Married Population65.9%  Unlock49.8%
     Currently Married  Unlock50.7%48.0%
 Married but Separated0.1%  Unlock1.8%
 Single Population  Unlock47.5%50.2%
 Never Married25.6%  Unlock33.8%
 Divorced  Unlock8.6%10.8%
 Widowed5.6%  Unlock5.6%
 space5
 Household Size  Unlock3.142.60
 Households3,942  Unlock124,010,992
 Family Households  Unlock12,62380,755,759
     Married couple, w/children35.7%  Unlock30.5%
     Married couple, no children  Unlock38.5%42.9%
 Non Family Households513  Unlock43,255,233
     Single householder, w/children  Unlock11.1%15.8%
     Single householder, no children10.6%  Unlock10.8%
Voting
Reviews for San Marino    2 Reviews
jane · San Marino, CA
Democrates 63%???
Over 15 years ago

I can't believe that the voters in this city -- always highly REPUBLICAN--are composed of 63% Democrats and in the 30s for republicans. I am a Democrat but was  More

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Stef · Norco, CA
Nice Growing Up There
Over 18 years ago

Our family lived right on the border of San Marino in the 50's and 60's. We went to the fine schools there and enjoyed a wonderful education. There were only 2  More

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Reviews for Placentia    6 Reviews
Ken · Melbourne, FL
CORRUPT - blocks critical comments on Facebook.
Over 4 years ago

I lived in that city for almost 10 years and recently found out that both their city government and their police force are blocking people from leaving bad reviews of  More

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Jerry · Placentia, CA
Living in Placentia
Over 14 years ago

PLACENTIA IS A GREAT PLACE TO LIVE. BEEN HERE SINCE 1980. EASY ACCESS TO FREEWAYS, PLENTY OF COMMERCIAL AND INDUSTRIAL BUSINESSES AROUND FOR EMPLOYMENT. NEARBY--GOLF  More

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Bp · Placentia, CA
Cheap Housing
Over 15 years ago

If you rent, Placentia's not bad. I haven't noticed too much crime but there are quite a few reasonable apartments. Being close to a California State School has its  More

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Learn More About San Marino, California
Overview
Cost of Living
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Learn More About Placentia, California
Overview
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