2025 Compare Cities People:
Boulder, CO vs San Mateo, CA

Change Cities
Highlights
- San Mateo is 0% more densely populated than Boulder.
- People are 64.6% more likely to be married in San Mateo.
- The Median Age is 8.8 years older in San Mateo.
 Boulder, COSan Mateo, CAUnited States
 Population  Unlock105,087329,725,481
 Female Population48.5%  Unlock50.5%
 Male Population51.5%  Unlock49.5%
 Median Age  Unlock37.738.4
 space3
 Population - 201097,724  Unlock309,327,143
 Population - 2000  Unlock92,482285,036,114
 Population - 199083,312  Unlock251,960,433
 Pop. 2000 to Now  Unlock10.7%15.6%
 Pop. 1990 to Now29.2%  Unlock30.8%
 space4
 Population Density  Unlock8,632.893.4
 Land Area26.3  Unlock3,531,905.4
 Water Area  Unlock3.7264,836.8
 space
 Est. Total Population By Age
 Boulder, COSan Mateo, CAUnited States
 Age 0 to 42.7%  Unlock5.9%
 Age 5 to 9  Unlock5.6%6.1%
 Age 10 to 143.6%  Unlock6.6%
 Age 15 to 17  Unlock2.7%3.9%
 Age 18 to 2016.2%  Unlock4.0%
 Age 21 to 24  Unlock4.1%5.2%
 Age 25 to 3416.3%  Unlock13.8%
 Age 35 to 44  Unlock15.4%12.9%
 Age 45 to 5410.3%  Unlock12.6%
 Age 55 to 59  Unlock5.8%6.7%
 Age 60 to 644.2%  Unlock6.3%
 Age 65 to 74  Unlock8.0%9.6%
 Age 75 to 843.1%  Unlock4.5%
 Age 85 and over  Unlock2.8%1.9%
 space1
 Race
 Boulder, COSan Mateo, CAUnited States
 White78.3%  Unlock59.4%
 Black  Unlock1.9%12.2%
 Asian5.9%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.6%0.4%
 Two or More Races3.5%  Unlock3.2%
 Hispanic  Unlock24.1%18.4%
 space2
 Marriage & Family
 Boulder, COSan Mateo, CAUnited States
 Married Population31.9%  Unlock49.8%
     Currently Married  Unlock51.3%48.0%
 Married but Separated0.7%  Unlock1.8%
 Single Population  Unlock47.4%50.2%
 Never Married56.1%  Unlock33.8%
 Divorced  Unlock8.9%10.8%
 Widowed2.5%  Unlock5.6%
 space5
 Household Size  Unlock2.582.60
 Households42,610  Unlock124,010,992
 Family Households  Unlock25,42080,755,759
     Married couple, w/children33.3%  Unlock30.5%
     Married couple, no children  Unlock43.3%42.9%
 Non Family Households25,269  Unlock43,255,233
     Single householder, w/children  Unlock10.4%15.8%
     Single householder, no children8.5%  Unlock10.8%
Reviews for Boulder    55 Reviews

Outside of the university, Boulder had a very distinctive "wealthy hippy" feel. A lot of alternative medicine and a matching ethos. This is changing some among my  More

   |    Reply

We moved here from Texas about 4 years ago and love it here! The amazing sense of community and high regard for the environment are two of the main reasons we love  More

   |    Reply

Over 5 years ago

Most people do much worse than Boulder. I'm the most critical person I've ever met who is never happy or satisfied -- so that's a pretty huge compliment.   More

   |    Reply

Start Your Review of Boulder

Reviews for San Mateo    12 Reviews

I have lived in San Mateo since 2013. It has seen tremendous growth, lots of new restaurants which have become progressively more high-end though there is ample  More

   |    Reply

I'm a native of California. I have lived in the southern part of the state and the northern part of the state for most of my life. I have spent the last 29 years in  More

   |    Reply

Over 15 years ago

San Mateo has a diverse mix of people, a pleasant climate, a very pleasant downtown park with lots going on, and pretty much whatever you need handy. It's not far to  More

   |    Reply

Start Your Review of San Mateo


Premium Subscription
Includes Cost of Living compares for child care, utilities, transportation, health, taxes, housing for home owners vs renters, weather, insurance premiums and so much more.


The premier source for comprehensive city data for over 30 years.

© Best Places. All rights reserved.