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2025 Compare Cities People:
Johnston, IA vs Altadena, CA

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Highlights
- Altadena is 0% more densely populated than Johnston.
- People are 17.9% less likely to be married in Altadena.
- The Median Age is 6.2 years older in Altadena.
 Johnston, IAAltadena, CAUnited States
 Population  Unlock43,384329,725,481
 Female Population50.8%  Unlock50.5%
 Male Population49.2%  Unlock49.5%
 Median Age  Unlock43.938.4
 space3
 Population - 201017,388  Unlock309,327,143
 Population - 2000  Unlock42,610285,036,114
 Population - 19904,702  Unlock251,960,433
 Pop. 2000 to Now  Unlock4.8%15.6%
 Pop. 1990 to Now391.1%  Unlock30.8%
 space4
 Population Density  Unlock5,124.593.4
 Land Area16.8  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Johnston, IAAltadena, CAUnited States
 Age 0 to 47.1%  Unlock5.9%
 Age 5 to 9  Unlock5.5%6.1%
 Age 10 to 148.1%  Unlock6.6%
 Age 15 to 17  Unlock3.5%3.9%
 Age 18 to 201.7%  Unlock4.0%
 Age 21 to 24  Unlock3.4%5.2%
 Age 25 to 3412.1%  Unlock13.8%
 Age 35 to 44  Unlock13.0%12.9%
 Age 45 to 5414.1%  Unlock12.6%
 Age 55 to 59  Unlock8.2%6.7%
 Age 60 to 644.3%  Unlock6.3%
 Age 65 to 74  Unlock10.5%9.6%
 Age 75 to 843.9%  Unlock4.5%
 Age 85 and over  Unlock2.7%1.9%
 space1
 Race
 Johnston, IAAltadena, CAUnited States
 White78.3%  Unlock59.4%
 Black  Unlock19.8%12.2%
 Asian6.5%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.4%0.4%
 Two or More Races2.1%  Unlock3.2%
 Hispanic  Unlock29.3%18.4%
 space2
 Marriage & Family
 Johnston, IAAltadena, CAUnited States
 Married Population60.7%  Unlock49.8%
     Currently Married  Unlock48.0%48.0%
 Married but Separated1.2%  Unlock1.8%
 Single Population  Unlock50.2%50.2%
 Never Married25.1%  Unlock33.8%
 Divorced  Unlock11.3%10.8%
 Widowed4.9%  Unlock5.6%
 space5
 Household Size  Unlock2.892.60
 Households9,256  Unlock124,010,992
 Family Households  Unlock10,75380,755,759
     Married couple, w/children37.4%  Unlock30.5%
     Married couple, no children  Unlock42.0%42.9%
 Non Family Households2,958  Unlock43,255,233
     Single householder, w/children  Unlock14.4%15.8%
     Single householder, no children2.1%  Unlock10.8%
Voting
Reviews for Johnston    2 Reviews
Riana · Johnston, IA
Great Schools
Over 6 years ago

Strong National Guard presence and very family-friendly. The library is the best one that I've ever visited. We moved here for the Army two years ago and will be leaving  More

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Callie · Johnston, IA
the cost of living
Over 16 years ago

Everyone here is rich. Really, really,  More

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Reviews for Altadena    1 Reviews
Les · Altadena, CA
Altadena: High and Dry in L.A.
Over 15 years ago

I live just above the 1500 foot elevation at the edge of the San Gabriel Mountains in the L.A. suburb of Altadena--just above Pasadena. We're above the low morning fog  More

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Learn More About Johnston, Iowa
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Learn More About Altadena, California
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