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2025 Compare Cities People:
Kailua (Honolulu County), HI vs San Marcos, CA

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Highlights
- San Marcos is 0% more densely populated than Kailua (Honolulu County).
- People are 5.2% less likely to be married in San Marcos.
- The Median Age is 6.3 years younger in San Marcos.
 Kailua (Honolulu County), HISan Marcos, CAUnited States
 Population  Unlock94,313329,725,481
 Female Population50.2%  Unlock50.5%
 Male Population49.8%  Unlock49.5%
 Median Age  Unlock35.638.4
 space3
 Population - 201038,541  Unlock309,327,143
 Population - 2000  Unlock54,977285,036,114
 Population - 199036,818  Unlock251,960,433
 Pop. 2000 to Now  Unlock77.3%15.6%
 Pop. 1990 to Now0.5%  Unlock30.8%
 space4
 Population Density  Unlock3,872.393.4
 Land Area7.8  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Kailua (Honolulu County), HISan Marcos, CAUnited States
 Age 0 to 45.6%  Unlock5.9%
 Age 5 to 9  Unlock8.0%6.1%
 Age 10 to 146.7%  Unlock6.6%
 Age 15 to 17  Unlock3.5%3.9%
 Age 18 to 202.9%  Unlock4.0%
 Age 21 to 24  Unlock4.5%5.2%
 Age 25 to 3411.7%  Unlock13.8%
 Age 35 to 44  Unlock15.9%12.9%
 Age 45 to 5412.2%  Unlock12.6%
 Age 55 to 59  Unlock5.5%6.7%
 Age 60 to 646.6%  Unlock6.3%
 Age 65 to 74  Unlock7.5%9.6%
 Age 75 to 844.9%  Unlock4.5%
 Age 85 and over  Unlock1.8%1.9%
 space1
 Race
 Kailua (Honolulu County), HISan Marcos, CAUnited States
 White41.4%  Unlock59.4%
 Black  Unlock1.5%12.2%
 Asian19.9%  Unlock5.6%
 Native American  Unlock0.3%0.6%
 Hawaiian, Pacific Islander4.1%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races24.3%  Unlock3.2%
 Hispanic  Unlock39.7%18.4%
 space2
 Marriage & Family
 Kailua (Honolulu County), HISan Marcos, CAUnited States
 Married Population57.1%  Unlock49.8%
     Currently Married  Unlock52.7%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock45.9%50.2%
 Never Married27.8%  Unlock33.8%
 Divorced  Unlock9.1%10.8%
 Widowed6.2%  Unlock5.6%
 space5
 Household Size  Unlock3.082.60
 Households13,039  Unlock124,010,992
 Family Households  Unlock22,51780,755,759
     Married couple, w/children32.9%  Unlock30.5%
     Married couple, no children  Unlock35.3%42.9%
 Non Family Households3,304  Unlock43,255,233
     Single householder, w/children  Unlock14.4%15.8%
     Single householder, no children12.5%  Unlock10.8%
Voting
Reviews for Kailua (Honolulu County)    10 Reviews
Greg · Kailua, HI
Beautiful but with a price.
Over 10 years ago

I have live in Kailua Oahu, HI for more than 27 years. I love this place but the cost to live here is becoming to much as I approach retirement. It also has become  More

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Edward · Kailua, HI
Best place to live.
Over 13 years ago

Kailua is a perfect place to live if you like a relaxed and friendly neighborhood. It is close to local shops, local restaurants, beaches and ocean activities. Easy  More

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Brian · Kailua, HI
Nothing short of Paradise!
Over 14 years ago

We've been here for the past 10 years, and it is truly heaven on earth from an environmental perspective, but a Cost of Living comparison will scare the daylights out of  More

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Reviews for San Marcos    5 Reviews
Kevin · San Marcos, CA
Best place I have ever lived.
Over 7 years ago

Just an amazing place to live. I have lived in 7 states and almost countless cities. Sam Marcos is one of the best. This is literally the longest place I have lived  More

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Norman · Vail, AZ
retiree location ?
Over 15 years ago

Is this area to expensive for the average income retired  More

   |    Reply
Greg · South Pasadena, CA
San Marcos Weather
Over 18 years ago

Beautiful Mediterranean climate with bright sunshine and ocean breazes. City is just 15 minutes away from the  More

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Learn More About Kailua (Honolulu County), Hawaii
Overview
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Learn More About San Marcos, California
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