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CITY · 2000 CENSUS

Islip

New York · 20,575 residents · 4.749 sq mi
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The short version

Islip is significantly wealthier than the US average, with a median household income of $65,657. Population has held roughly steady since 1990. Median home value is $171,800. Poverty is rare here, at 4.1% of residents. Households here earn about 51% more than the New York median.

At a glance
Wealthier
above the US median
US median: $42,589
Mid-age
median age 36.1
US median: 35.2
Average education
24% hold a bachelor's degree
US average: 24%
More affordable
home values down 16%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

20,575
+9%since 1990
from 18,924 in 1990
1990 – 2024
4,332 / sq mi
+9%since 1990
from 3,985 / sq mi in 1990
US average: 242
36.1
+13%since 1990
from 32.1 in 1990
US average: 35.2
Population, 19902024
17K18K19K20K21K1990201020202024Islip
202417K
1990201020202024
Section 02

Income & economy

$65,657
−1%inflation adjusted, since 1990
from $50,459 in 1990
US average: $42,589
1990 – 2024
$25,383
+37%since 1990
from $18,515 in 1990
US average: $21,522
4.1%
+0.6 ptssince 1990
from 3.5% in 1990
US average: 12.4%
Section 03

Housing

$171,800
−16%inflation adjusted, since 1990
from $154,500 in 1990
US average: $120,530
1990 – 2024
$948
−9%inflation adjusted, since 1990
from $794 in 1990
US average: $602
74.0%
−4.5 ptssince 1990
from 78.5% in 1990
26.0% rent
2.6
−15%since 1990
from 3.1 in 1990
1990 – 2024
RELATED:See current rent listings in Islip on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic93%(17,594)
Black3.3%(622)
Hispanic / Latino7.2%(1,371)
Asian1.2%(224)
Diversity Score30.3%(5,731)
2000
White, non-Hispanic81.3%(16,721)
Black4.6%(937)
Hispanic / Latino10.7%(2,195)
Asian2%(410)
Diversity Score38.1%(7,838)
38
+26%since 1990
from 30 in 1990
1990 – 2024
Section 05

Education

23.6%
+4.5 ptssince 1990
from 19.0% in 1990
US average: 24.4%
High school or higher
88.3%
+3.6 ptssince 1990
from 84.6% in 1990
US average: 80.3%
10.8%
+4.0 ptssince 1990
from 6.7% in 1990
US average: 8.8%
Section 06

Commute & transportation

23.1 min
−8%since 1990
from 25.2 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

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Frequently asked

How many people live in Islip, New York?

Islip, New York has about 20,575 residents according to the 2000 Census.

What is the median household income in Islip, New York?

The typical household in Islip, New York earns about $65,657 a year. Half of households make more than that, and half make less.

Is Islip, New York expensive?

In Islip, New York, the median home is worth about $171,800, and the typical rent is about $948 a month.

How educated are people in Islip, New York?

About 23.6% of adults age 25 and over in Islip, New York hold a bachelor's degree or higher.

What is the poverty rate in Islip, New York?

About 4.1% of people in Islip, New York live below the federal poverty line.

Has Islip, New York grown since 1990?

Yes, Islip, New York has grown since 1990. The population has added about 1,651 residents, a change of about 9 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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