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2025 Compare Cities People:
Hillside, NJ vs Mountainside, NJ

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Highlights
- Mountainside is 0% more densely populated than Hillside.
- People are 61.9% more likely to be married in Mountainside.
- The Median Age is 14.1 years older in Mountainside.
 Hillside, NJMountainside, NJUnited States
 Population  Unlock7,003329,725,481
 Female Population51.4%  Unlock50.5%
 Male Population48.6%  Unlock49.5%
 Median Age  Unlock5138.4
 space3
 Population - 201021,494  Unlock309,327,143
 Population - 2000  Unlock6,602285,036,114
 Population - 199021,044  Unlock251,960,433
 Pop. 2000 to Now  Unlock4.2%15.6%
 Pop. 1990 to Now3.8%  Unlock30.8%
 space4
 Population Density  Unlock1,752.593.4
 Land Area2.7  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Hillside, NJMountainside, NJUnited States
 Age 0 to 46.0%  Unlock5.9%
 Age 5 to 9  Unlock4.0%6.1%
 Age 10 to 146.0%  Unlock6.6%
 Age 15 to 17  Unlock4.8%3.9%
 Age 18 to 204.3%  Unlock4.0%
 Age 21 to 24  Unlock2.9%5.2%
 Age 25 to 3416.5%  Unlock13.8%
 Age 35 to 44  Unlock11.2%12.9%
 Age 45 to 5414.6%  Unlock12.6%
 Age 55 to 59  Unlock9.1%6.7%
 Age 60 to 646.0%  Unlock6.3%
 Age 65 to 74  Unlock13.6%9.6%
 Age 75 to 844.0%  Unlock4.5%
 Age 85 and over  Unlock5.2%1.9%
 space1
 Race
 Hillside, NJMountainside, NJUnited States
 White19.9%  Unlock59.4%
 Black  Unlock2.3%12.2%
 Asian2.0%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races1.6%  Unlock3.2%
 Hispanic  Unlock12.5%18.4%
 space2
 Marriage & Family
 Hillside, NJMountainside, NJUnited States
 Married Population43.7%  Unlock49.8%
     Currently Married  Unlock70.7%48.0%
 Married but Separated2.5%  Unlock1.8%
 Single Population  Unlock29.3%50.2%
 Never Married40.6%  Unlock33.8%
 Divorced  Unlock2.2%10.8%
 Widowed6.8%  Unlock5.6%
 space5
 Household Size  Unlock2.682.60
 Households7,191  Unlock124,010,992
 Family Households  Unlock1,98380,755,759
     Married couple, w/children25.3%  Unlock30.5%
     Married couple, no children  Unlock55.2%42.9%
 Non Family Households1,679  Unlock43,255,233
     Single householder, w/children  Unlock3.2%15.8%
     Single householder, no children19.5%  Unlock10.8%
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Learn More About Hillside, New Jersey
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