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2025 Compare Cities People:
San Marcos, CA vs Idaho Falls, ID

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Highlights
- Idaho Falls is 0% more densely populated than San Marcos.
- People are 4.0% less likely to be married in Idaho Falls.
- The Median Age is 2.0 years younger in Idaho Falls.
 San Marcos, CAIdaho Falls, IDUnited States
 Population  Unlock64,399329,725,481
 Female Population50.1%  Unlock50.5%
 Male Population49.9%  Unlock49.5%
 Median Age  Unlock33.638.4
 space3
 Population - 201083,948  Unlock309,327,143
 Population - 2000  Unlock50,730285,036,114
 Population - 199038,974  Unlock251,960,433
 Pop. 2000 to Now  Unlock26.4%15.6%
 Pop. 1990 to Now150.1%  Unlock30.8%
 space4
 Population Density  Unlock2,758.293.4
 Land Area24.4  Unlock3,531,905.4
 Water Area  Unlock0.5264,836.8
 space
 Est. Total Population By Age
 San Marcos, CAIdaho Falls, IDUnited States
 Age 0 to 46.9%  Unlock5.9%
 Age 5 to 9  Unlock8.3%6.1%
 Age 10 to 148.0%  Unlock6.6%
 Age 15 to 17  Unlock4.7%3.9%
 Age 18 to 205.2%  Unlock4.0%
 Age 21 to 24  Unlock5.0%5.2%
 Age 25 to 3412.9%  Unlock13.8%
 Age 35 to 44  Unlock13.2%12.9%
 Age 45 to 5412.4%  Unlock12.6%
 Age 55 to 59  Unlock5.8%6.7%
 Age 60 to 644.6%  Unlock6.3%
 Age 65 to 74  Unlock7.5%9.6%
 Age 75 to 843.3%  Unlock4.5%
 Age 85 and over  Unlock1.6%1.9%
 space1
 Race
 San Marcos, CAIdaho Falls, IDUnited States
 White43.5%  Unlock59.4%
 Black  Unlock0.4%12.2%
 Asian10.5%  Unlock5.6%
 Native American  Unlock0.6%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races4.2%  Unlock3.2%
 Hispanic  Unlock17.5%18.4%
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 Marriage & Family
 San Marcos, CAIdaho Falls, IDUnited States
 Married Population54.1%  Unlock49.8%
     Currently Married  Unlock50.3%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock48.0%50.2%
 Never Married31.5%  Unlock33.8%
 Divorced  Unlock14.1%10.8%
 Widowed5.2%  Unlock5.6%
 space5
 Household Size  Unlock2.662.60
 Households30,304  Unlock124,010,992
 Family Households  Unlock15,31780,755,759
     Married couple, w/children40.9%  Unlock30.5%
     Married couple, no children  Unlock38.5%42.9%
 Non Family Households7,787  Unlock43,255,233
     Single householder, w/children  Unlock19.4%15.8%
     Single householder, no children9.4%  Unlock10.8%
Voting
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

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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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Reviews for Idaho Falls    36 Reviews
Taylor · Idaho Falls, ID
Becoming a bit much
Over 3 years ago

After escaping the liberalism in California I moved here with my family and loved the friendly folks, cleanliness, and beautiful views. Some things that I dislike is the  More

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Bruce · Idaho Falls, ID
Got a little much for this small town boy
Over 4 years ago

I have lived here for about 17 years. I will admit that I have difficulty with the winter, the wind and the traffic. It seems that the traffic is constantly getting  More

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Donald · Sequim, WA
One of the last best places
Over 4 years ago

Anywhere in Idaho, Montana, Wyoming and Utah are now THEe BEST places to live. There is a reason people are flocking there...to live red, since blue has driven them out  More

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Learn More About San Marcos, California
Overview
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Learn More About Idaho Falls, Idaho
Overview
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