2025 Compare Cities People:
San Luis Obispo, CA vs Ontario, OR

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Highlights
- Ontario is 0% more densely populated than San Luis Obispo.
- People are 44.4% more likely to be married in Ontario.
- The Median Age is 8.4 years older in Ontario.
 San Luis Obispo, CAOntario, ORUnited States
 Population  Unlock11,465329,725,481
 Female Population49.1%  Unlock50.5%
 Male Population50.9%  Unlock49.5%
 Median Age  Unlock34.438.4
 space3
 Population - 201045,193  Unlock309,327,143
 Population - 2000  Unlock10,985285,036,114
 Population - 199041,958  Unlock251,960,433
 Pop. 2000 to Now  Unlock1.4%15.6%
 Pop. 1990 to Now13.4%  Unlock30.8%
 space4
 Population Density  Unlock2,219.893.4
 Land Area13.1  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
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 Est. Total Population By Age
 San Luis Obispo, CAOntario, ORUnited States
 Age 0 to 43.1%  Unlock5.9%
 Age 5 to 9  Unlock7.0%6.1%
 Age 10 to 142.9%  Unlock6.6%
 Age 15 to 17  Unlock3.6%3.9%
 Age 18 to 2014.7%  Unlock4.0%
 Age 21 to 24  Unlock4.5%5.2%
 Age 25 to 3413.4%  Unlock13.8%
 Age 35 to 44  Unlock10.1%12.9%
 Age 45 to 547.5%  Unlock12.6%
 Age 55 to 59  Unlock5.7%6.7%
 Age 60 to 645.5%  Unlock6.3%
 Age 65 to 74  Unlock9.1%9.6%
 Age 75 to 843.7%  Unlock4.5%
 Age 85 and over  Unlock5.1%1.9%
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 Race
 San Luis Obispo, CAOntario, ORUnited States
 White70.7%  Unlock59.4%
 Black  Unlock0.2%12.2%
 Asian4.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races3.9%  Unlock3.2%
 Hispanic  Unlock48.5%18.4%
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 Marriage & Family
 San Luis Obispo, CAOntario, ORUnited States
 Married Population28.8%  Unlock49.8%
     Currently Married  Unlock38.8%48.0%
 Married but Separated0.9%  Unlock1.8%
 Single Population  Unlock58.4%50.2%
 Never Married59.0%  Unlock33.8%
 Divorced  Unlock14.0%10.8%
 Widowed3.9%  Unlock5.6%
 space5
 Household Size  Unlock2.542.60
 Households19,035  Unlock124,010,992
 Family Households  Unlock2,45380,755,759
     Married couple, w/children23.1%  Unlock30.5%
     Married couple, no children  Unlock38.1%42.9%
 Non Family Households11,342  Unlock43,255,233
     Single householder, w/children  Unlock22.4%15.8%
     Single householder, no children15.3%  Unlock10.8%
Reviews for San Luis Obispo    21 Reviews

MY FIANCEE AND I ARE LOOKING TO MOVE TO SLO FOR RETIREMENT ( NEXT MONTH ) WE ARE BOTH ARTISTS AND HOPE OUR TALENT WILL HELP WITH COST OF LIVING IN SLO!!! ANY  More

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Over 10 years ago

In almost any season of the year in San Luis Obispo, you’ll find the sun shining and the temperature hitting around 70º at some point in the day. With the temperature  More

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San Luis Obispo and surrounding areas are beautiful, great weather, beaches, farms markets, a downtown area full of some of the best bars and restaurants, wine country,  More

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Reviews for Ontario    6 Reviews

Over 4 years ago

Dirty officers. You tell them where to look for drugs but because they know the family they don't bother doing anything about it. Don't trust the  More

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Ontario Oregon is full of illegal immigrants who refuse to learn English and leach off the welfare system the police and ice refuse to deport these criminals Meth use  More

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Over 11 years ago

In reply to "Crime in Ontario," It's too bad that when a Hispanic culture moves in to a nice little town, your crime rate goes up and property values go down. And  More

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