2026 Compare Cities People:
Rancho Santa Margarita, CA vs Oceanside, CA

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Highlights
- Oceanside is 0% more densely populated than Rancho Santa Margarita.
- People are 13.7% less likely to be married in Oceanside.
- The Median Age is 2.6 years younger in Oceanside.
 Rancho Santa Margarita, CAOceanside, CAUnited States
 Population  Unlock174,461329,725,481
 Female Population51.0%  Unlock50.5%
 Male Population49.0%  Unlock49.5%
 Median Age  Unlock37.138.4
 space3
 Population - 201047,877  Unlock309,327,143
 Population - 2000  Unlock161,029285,036,114
 Population - 199011,390  Unlock251,960,433
 Pop. 2000 to Now  Unlock8.5%15.6%
 Pop. 1990 to Now317.6%  Unlock30.8%
 space4
 Population Density  Unlock4,230.093.4
 Land Area12.9  Unlock3,531,905.4
 Water Area  Unlock0.9264,836.8
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 Est. Total Population By Age
 Rancho Santa Margarita, CAOceanside, CAUnited States
 Age 0 to 46.4%  Unlock5.9%
 Age 5 to 9  Unlock5.8%6.1%
 Age 10 to 147.1%  Unlock6.6%
 Age 15 to 17  Unlock3.2%3.9%
 Age 18 to 203.6%  Unlock4.0%
 Age 21 to 24  Unlock5.8%5.2%
 Age 25 to 3411.8%  Unlock13.8%
 Age 35 to 44  Unlock13.1%12.9%
 Age 45 to 5416.1%  Unlock12.6%
 Age 55 to 59  Unlock6.6%6.7%
 Age 60 to 647.3%  Unlock6.3%
 Age 65 to 74  Unlock8.5%9.6%
 Age 75 to 842.5%  Unlock4.5%
 Age 85 and over  Unlock1.9%1.9%
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 Race
 Rancho Santa Margarita, CAOceanside, CAUnited States
 White60.5%  Unlock59.4%
 Black  Unlock4.4%12.2%
 Asian11.1%  Unlock5.6%
 Native American  Unlock0.3%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races5.5%  Unlock3.2%
 Hispanic  Unlock37.8%18.4%
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 Marriage & Family
 Rancho Santa Margarita, CAOceanside, CAUnited States
 Married Population59.4%  Unlock49.8%
     Currently Married  Unlock49.7%48.0%
 Married but Separated0.8%  Unlock1.8%
 Single Population  Unlock48.7%50.2%
 Never Married28.2%  Unlock33.8%
 Divorced  Unlock11.1%10.8%
 Widowed2.9%  Unlock5.6%
 space5
 Household Size  Unlock2.862.60
 Households16,825  Unlock124,010,992
 Family Households  Unlock41,75080,755,759
     Married couple, w/children41.8%  Unlock30.5%
     Married couple, no children  Unlock44.9%42.9%
 Non Family Households3,817  Unlock43,255,233
     Single householder, w/children  Unlock13.7%15.8%
     Single householder, no children10.0%  Unlock10.8%
Reviews for Rancho Santa Margarita    13 Reviews

This page provides little information on RSM. I see they keep describing the area as "outside of Los Angeles." Culturally, it is so far from Los Angeles (I lived in LA,  More

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Over 11 years ago

The weather here is amazing. We get a few hot days in the summer but it cools down in the evening. I love being able to sleep with the windows  More

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This is the best place to live in South Orange County with mild temperatures, low crime, great schools and family orientated. RSM is a city that sits in a pocket backing  More

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Reviews for Oceanside    20 Reviews

Over 7 years ago

I've lived in here since 1988, left in 1995 and came back in 2005. I will always love Oceanside. You have to come check it out. It has changed so drastically and there  More

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Over 8 years ago

from oceanside ca love the city always love the beach life u can't get anywhere else yes... it has been cleaned up and welcomes people from all over . I miss my  More

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Moved to O'Side Nov 1988 (Lived there from 78 thru 79 prior to moving back in 88). 78-1979 was a Fun, Good, Relaxing Time to Live in O'Side- Low Crime Rate, Low  More

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