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2026 Compare Cities People:
Helena, MT vs Foster City, CA

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Highlights
- Foster City is 0% more densely populated than Helena.
- People are 47.7% more likely to be married in Foster City.
- The Median Age is 0.3 years younger in Foster City.
 Helena, MTFoster City, CAUnited States
 Population  Unlock33,511329,725,481
 Female Population51.9%  Unlock50.5%
 Male Population48.1%  Unlock49.5%
 Median Age  Unlock39.638.4
 space3
 Population - 201028,909  Unlock309,327,143
 Population - 2000  Unlock28,803285,036,114
 Population - 199024,569  Unlock251,960,433
 Pop. 2000 to Now  Unlock14.2%15.6%
 Pop. 1990 to Now37.3%  Unlock30.8%
 space4
 Population Density  Unlock8,828.093.4
 Land Area16.7  Unlock3,531,905.4
 Water Area  Unlock16.0264,836.8
 space
 Est. Total Population By Age
 Helena, MTFoster City, CAUnited States
 Age 0 to 44.8%  Unlock5.9%
 Age 5 to 9  Unlock7.2%6.1%
 Age 10 to 145.9%  Unlock6.6%
 Age 15 to 17  Unlock3.9%3.9%
 Age 18 to 204.3%  Unlock4.0%
 Age 21 to 24  Unlock2.7%5.2%
 Age 25 to 3412.6%  Unlock13.8%
 Age 35 to 44  Unlock16.9%12.9%
 Age 45 to 5410.9%  Unlock12.6%
 Age 55 to 59  Unlock5.8%6.7%
 Age 60 to 646.6%  Unlock6.3%
 Age 65 to 74  Unlock8.5%9.6%
 Age 75 to 846.5%  Unlock4.5%
 Age 85 and over  Unlock2.5%1.9%
 space1
 Race
 Helena, MTFoster City, CAUnited States
 White87.9%  Unlock59.4%
 Black  Unlock2.4%12.2%
 Asian0.8%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races4.3%  Unlock3.2%
 Hispanic  Unlock8.6%18.4%
 space2
 Marriage & Family
 Helena, MTFoster City, CAUnited States
 Married Population42.2%  Unlock49.8%
     Currently Married  Unlock61.1%48.0%
 Married but Separated0.9%  Unlock1.8%
 Single Population  Unlock37.6%50.2%
 Never Married32.4%  Unlock33.8%
 Divorced  Unlock6.2%10.8%
 Widowed6.9%  Unlock5.6%
 space5
 Household Size  Unlock2.672.60
 Households15,032  Unlock124,010,992
 Family Households  Unlock8,85780,755,759
     Married couple, w/children29.4%  Unlock30.5%
     Married couple, no children  Unlock40.5%42.9%
 Non Family Households7,894  Unlock43,255,233
     Single householder, w/children  Unlock7.8%15.8%
     Single householder, no children7.1%  Unlock10.8%
Voting
Reviews for Helena    17 Reviews
Doug · Helena Valley West Central, MT
Nice safe mountain town. Little too quiet for me
Over 4 years ago

I spent 6 months living on a ranch in the Helena valley. This was during the population boom Montana experienced after covid. Helena has some great mountain biking  More

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Christine · Helena Valley West Central, MT
Best Decision Ever
Over 4 years ago

We transplanted from Southern California 3 years ago and have never looked back! Living in the small unincorporated town of York Montana located in the Helena nation  More

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Al 68 · Ogden, UT
Growing up in Helena
Over 6 years ago

I lived here for 16 years. It is a great place to grow  More

   |    Reply

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Reviews for Foster City    4 Reviews
Jackie · San Mateo, CA
Great Family Town!
Over 18 years ago

Built on lagoons, great climate, good schools, lots of soccer and other sports for kids, plenty of parking and  More

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prashanth · San Mateo, CA
Foster City
Over 19 years ago

A great city to raise a family, safe, great weather around the year, good schools and plenty of recreation. But only if you can afford the hight cost of  More

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Therese · San Mateo, CA
Expensive But Worth It If You Can Afford It
Over 20 years ago

Landlords are able to command and receive high rent due to the following attributes: safety, weather and cleanliness of Foster City. The lagoon, waterways and gardens  More

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Learn More About Helena, Montana
Overview
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Learn More About Foster City, California
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