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2025 Compare Cities People:
Ontario, CA vs San Diego, CA

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Highlights
- San Diego is 0% more densely populated than Ontario.
- People are 1.2% less likely to be married in San Diego.
- The Median Age is 2.8 years older in San Diego.
 Ontario, CASan Diego, CAUnited States
 Population  Unlock1,385,398329,725,481
 Female Population50.5%  Unlock50.5%
 Male Population49.5%  Unlock49.5%
 Median Age  Unlock35.438.4
 space3
 Population - 2010164,380  Unlock309,327,143
 Population - 2000  Unlock1,223,400285,036,114
 Population - 1990133,179  Unlock251,960,433
 Pop. 2000 to Now  Unlock16.3%15.6%
 Pop. 1990 to Now37.7%  Unlock30.8%
 space4
 Population Density  Unlock4,255.093.4
 Land Area50.0  Unlock3,531,905.4
 Water Area  Unlock46.8264,836.8
 space
 Est. Total Population By Age
 Ontario, CASan Diego, CAUnited States
 Age 0 to 46.8%  Unlock5.9%
 Age 5 to 9  Unlock5.4%6.1%
 Age 10 to 147.3%  Unlock6.6%
 Age 15 to 17  Unlock3.1%3.9%
 Age 18 to 204.2%  Unlock4.0%
 Age 21 to 24  Unlock6.3%5.2%
 Age 25 to 3417.7%  Unlock13.8%
 Age 35 to 44  Unlock14.3%12.9%
 Age 45 to 5411.8%  Unlock12.6%
 Age 55 to 59  Unlock5.7%6.7%
 Age 60 to 645.3%  Unlock6.3%
 Age 65 to 74  Unlock8.0%9.6%
 Age 75 to 842.6%  Unlock4.5%
 Age 85 and over  Unlock1.6%1.9%
 space1
 Race
 Ontario, CASan Diego, CAUnited States
 White14.7%  Unlock59.4%
 Black  Unlock5.7%12.2%
 Asian6.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.3%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races2.6%  Unlock3.2%
 Hispanic  Unlock30.1%18.4%
 space2
 Marriage & Family
 Ontario, CASan Diego, CAUnited States
 Married Population47.0%  Unlock49.8%
     Currently Married  Unlock44.8%48.0%
 Married but Separated2.8%  Unlock1.8%
 Single Population  Unlock53.6%50.2%
 Never Married41.1%  Unlock33.8%
 Divorced  Unlock9.5%10.8%
 Widowed3.7%  Unlock5.6%
 space5
 Household Size  Unlock2.642.60
 Households51,068  Unlock124,010,992
 Family Households  Unlock304,49980,755,759
     Married couple, w/children33.8%  Unlock30.5%
     Married couple, no children  Unlock41.9%42.9%
 Non Family Households11,037  Unlock43,255,233
     Single householder, w/children  Unlock13.4%15.8%
     Single householder, no children15.1%  Unlock10.8%
Voting
Reviews for Ontario    6 Reviews
Robert · Rancho Cucamonga, CA
Best Reformed Church available
Over 13 years ago

We've lived in this area for several years. Traveling long distances to other cities for churches. Passing a quiet, unassuming church along the way for years. Until  More

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sachamo · Pomona, CA
Home is where the heart is
Over 14 years ago

cool  More

   |    Reply
yvonne · Ontario, CA
Entertainment and shopping
Over 14 years ago

I think Ontario,ca us awesome because we have an entertainment Venue and large shopping mall to please everyone of all  More

   |    Reply

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Reviews for San Diego    319 Reviews
riley · Escondido, CA
Can you afford to live here?
Over 1 years ago

I have lived in San Diego for more than half my life (I am 30) and love it. It has something for everyone and more from arts, to sporting events, and all cuisine is  More

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Mark · San Diego, CA
America's finest city? If not, pretty darn close.
Over 3 years ago

The only real knock again San Diego is the cost of living, but it is paradise compared to most cities of similar size. Those who complain about the traffic here or say  More

   |    Reply
Peter · San Diego, CA
Beautiful Place, Too Crowded and Expensive.
Over 3 years ago

I have lived in San Diego since 1968 and I am now almost 62 years old. I love San Diego, I really do. But it has become so crowded and so expensive over the years. It  More

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Learn More About Ontario, California
Overview
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Learn More About San Diego, California
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