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2025 Compare Cities People:
Simi Valley, CA vs Herndon, VA

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Highlights
- Herndon is 0% more densely populated than Simi Valley.
- People are 10.0% more likely to be married in Herndon.
- The Median Age is 5.3 years younger in Herndon.
 Simi Valley, CAHerndon, VAUnited States
 Population  Unlock24,574329,725,481
 Female Population51.0%  Unlock50.5%
 Male Population49.1%  Unlock49.5%
 Median Age  Unlock35.738.4
 space3
 Population - 2010124,424  Unlock309,327,143
 Population - 2000  Unlock21,655285,036,114
 Population - 1990100,217  Unlock251,960,433
 Pop. 2000 to Now  Unlock13.5%15.6%
 Pop. 1990 to Now24.9%  Unlock30.8%
 space4
 Population Density  Unlock5,732.293.4
 Land Area41.5  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Simi Valley, CAHerndon, VAUnited States
 Age 0 to 45.2%  Unlock5.9%
 Age 5 to 9  Unlock7.2%6.1%
 Age 10 to 146.6%  Unlock6.6%
 Age 15 to 17  Unlock4.0%3.9%
 Age 18 to 203.8%  Unlock4.0%
 Age 21 to 24  Unlock6.0%5.2%
 Age 25 to 3413.3%  Unlock13.8%
 Age 35 to 44  Unlock16.5%12.9%
 Age 45 to 5414.8%  Unlock12.6%
 Age 55 to 59  Unlock6.5%6.7%
 Age 60 to 646.7%  Unlock6.3%
 Age 65 to 74  Unlock6.8%9.6%
 Age 75 to 844.5%  Unlock4.5%
 Age 85 and over  Unlock0.4%1.9%
 space1
 Race
 Simi Valley, CAHerndon, VAUnited States
 White57.6%  Unlock59.4%
 Black  Unlock7.0%12.2%
 Asian11.1%  Unlock5.6%
 Native American  Unlock0.7%0.6%
 Hawaiian, Pacific Islander0.1%  Unlock0.2%
 Other  Unlock0.8%0.4%
 Two or More Races3.8%  Unlock3.2%
 Hispanic  Unlock36.7%18.4%
 space2
 Marriage & Family
 Simi Valley, CAHerndon, VAUnited States
 Married Population50.5%  Unlock49.8%
     Currently Married  Unlock54.1%48.0%
 Married but Separated1.4%  Unlock1.8%
 Single Population  Unlock44.4%50.2%
 Never Married33.6%  Unlock33.8%
 Divorced  Unlock7.3%10.8%
 Widowed5.9%  Unlock5.6%
 space5
 Household Size  Unlock3.102.60
 Households43,893  Unlock124,010,992
 Family Households  Unlock5,74780,755,759
     Married couple, w/children32.3%  Unlock30.5%
     Married couple, no children  Unlock39.5%42.9%
 Non Family Households12,928  Unlock43,255,233
     Single householder, w/children  Unlock12.2%15.8%
     Single householder, no children12.8%  Unlock10.8%
Voting
Reviews for Simi Valley    22 Reviews
Arnold · Simi Valley, CA
Growing Challenges- housing costs and still the "
Over 4 years ago

I've live in two different neighborhoods since fall of 1996 and depending on the neighborhood you're quality of life experience will vary. The price of housing is such  More

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Joseph · Simi Valley, CA
Great city(Little Pricey)
Over 15 years ago

I have lived in Simi Valley for 23 Years. I love it here but due to the cost of living am looking to relocate to another state/City where my money will go further. Simi  More

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john · Simi Valley, CA
good place to live
Over 16 years ago

simi valley is a very nice place to live within the shadow of the LA metro area. it has low crime and reasonable housing costs with ready access to indoor and outdoor  More

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Reviews for Herndon    12 Reviews
Adam · Herndon, VA
Herndon, VA Weather
Over 10 years ago

Seasons tend to be relatively mild. The warmer seasons are extended by 3-4 weeks as compared to the New York Metropolitan Area.  More

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Erin · Herndon, VA
traffic
Over 16 years ago

Traffic has gotten out of control the last couple of  More

   |    Reply
Mark · Herndon, VA
About Herndon
Over 16 years ago

We actually live south of Herndon in Oak Hill (Zip Code 20171). The Town of Herndon is incorporated, Oak Hill is not. Herndon is a nice enough city with an historic area  More

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Learn More About Simi Valley, California
Overview
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Learn More About Herndon, Virginia
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