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2026 Compare Cities People:
Katonah, NY vs West Islip, NY

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Highlights
- West Islip is 0% more densely populated than Katonah.
- People are 6.0% less likely to be married in West Islip.
- The Median Age is 5.1 years older in West Islip.
 Katonah, NYWest Islip, NYUnited States
 Population  Unlock27,557329,725,481
 Female Population58.6%  Unlock50.5%
 Male Population41.4%  Unlock49.5%
 Median Age  Unlock40.438.4
 space3
 Population - 20101,467  Unlock309,327,143
 Population - 2000  Unlock28,907285,036,114
 Population - 19901,625  Unlock251,960,433
 Pop. 2000 to Now  Unlock-7.3%15.6%
 Pop. 1990 to Now28.3%  Unlock30.8%
 space4
 Population Density  Unlock4,372.193.4
 Land Area0.7  Unlock3,531,905.4
 Water Area  Unlock0.5264,836.8
 space
 Est. Total Population By Age
 Katonah, NYWest Islip, NYUnited States
 Age 0 to 411.2%  Unlock5.9%
 Age 5 to 9  Unlock5.3%6.1%
 Age 10 to 145.2%  Unlock6.6%
 Age 15 to 17  Unlock3.7%3.9%
 Age 18 to 202.6%  Unlock4.0%
 Age 21 to 24  Unlock6.5%5.2%
 Age 25 to 3412.9%  Unlock13.8%
 Age 35 to 44  Unlock12.4%12.9%
 Age 45 to 549.5%  Unlock12.6%
 Age 55 to 59  Unlock8.5%6.7%
 Age 60 to 648.5%  Unlock6.3%
 Age 65 to 74  Unlock8.3%9.6%
 Age 75 to 844.2%  Unlock4.5%
 Age 85 and over  Unlock1.5%1.9%
 space1
 Race
 Katonah, NYWest Islip, NYUnited States
 White78.8%  Unlock59.4%
 Black  Unlock0.7%12.2%
 Asian4.0%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races0.0%  Unlock3.2%
 Hispanic  Unlock9.6%18.4%
 space2
 Marriage & Family
 Katonah, NYWest Islip, NYUnited States
 Married Population60.5%  Unlock49.8%
     Currently Married  Unlock55.7%48.0%
 Married but Separated0.0%  Unlock1.8%
 Single Population  Unlock43.1%50.2%
 Never Married20.7%  Unlock33.8%
 Divorced  Unlock6.3%10.8%
 Widowed2.1%  Unlock5.6%
 space5
 Household Size  Unlock3.162.60
 Households663  Unlock124,010,992
 Family Households  Unlock7,02480,755,759
     Married couple, w/children37.4%  Unlock30.5%
     Married couple, no children  Unlock46.6%42.9%
 Non Family Households112  Unlock43,255,233
     Single householder, w/children  Unlock8.8%15.8%
     Single householder, no children8.0%  Unlock10.8%
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Reviews for West Islip    1 Reviews
Kyle · West Islip, NY
Meh...
Over 16 years ago

It's a nice town full of middle-class to upper-class people. Mostly white though...wish it was more integrated.  More

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Learn More About Katonah, New York
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Learn More About West Islip, New York
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