West Islip
Property Data

Suffolk County, New York

Explore accurate parcel and ownership records,
directly sourced from county assessors.

Suffolk County

ZIP Codesby Total Population

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Total Population
25,37925,379

DistributionTotal Population

No data available

Demographics

Total Population

25,379

Median Age

38.1

Population Under 18

21.7%

Population 65+

13.9%

Total Households

8,011

Average Household Size

3.14

West Islip, NY housing and demographic statistics

ZIP/ZCTA areas can cross city and county boundaries. Each row describes its ZIP/ZCTA area, not the city as a whole. These values are not combined into a city estimate.

Individual ZIP/ZCTA estimates associated with West Islip, NY
ZIP/ZCTAPopulationMedian household incomeMedian monthly gross rentOwner-occupied share
1179525,379$177,269$2,79894.8%

Source: U.S. Census Bureau American Community Survey (ACS), 2020–2024 five-year estimates, via Realie. Measurement period: –. Published by the Census Bureau on ; published by Realie on . These are five-year estimates, not a measurement of current conditions. — indicates unavailable or suppressed data.

Area property statistics

Recorded property characteristics and residential parcel-sale records for West Islip, NY. Sale amounts describe recorded transfers, not asking prices or appraisals. Each measure uses records with that information available.

Sale records use the AVM's residential, amount, floor-area, year-built, price-per-area, deed, buyer-relationship and distress filters. Known multi-parcel deals are also excluded. Unknown package flags are not proof of a single-parcel sale. Counts represent eligible parcel sale records. Recorded annual averages require at least 10 eligible sales. Projections must have enough history and pass checks against earlier recorded sales. Recent sales can be underreported; different coverage between years can affect the changes.

City measurements cover the selected county's portion of the city.

Annual sales comparison

Calendar 2025 recorded sales versus calendar 2026 model projections. Both years cover January 1–December 31. Change compares the 2026 projection with the recorded 2025 value. Annual average amounts weight each month by its sales count; they are not monthly medians.

Calendar-year sales comparison
Metric20252026 projectedChange (%)
Residential sale records143Recorded——
Average recorded sale amount$892,995Recorded——

Projections are not confirmed transactions or property valuations. Recent sales can be underreported; different coverage between years can affect the change. Unsupported values remain unavailable. Ranges reflect historical model errors, not confidence intervals. Annual comparison calculated . Assumed observation cutoff: April 2026; not verified completeness.

Recorded property statistics

Reported property statistics for West Islip, NY
MeasureWest Islip, NYSuffolk County, NY
Median recorded sale amount$750,000$670,000
Recorded amount, 10th percentile$534,500$419,000
Recorded amount, 90th percentile$1,510,000$1,400,000
Average recorded floor area (sq ft)2,1212,004
Average recorded bedrooms3.83.4
Average recorded bathrooms2.32
Median year built19581969
Condominium share of properties0%1.9%

West Islip, NY: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 24, 2026. Calculated . Published . Dataset last refreshed: .

Suffolk County, NY: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 24, 2026. Calculated . Published . Dataset last refreshed: .

Source: Realie property-record aggregates. Input publication and calculation dates do not establish complete transaction coverage. Missing measures are shown as — or omitted.

Other recent-period estimates

These use different periods from the calendar-year comparison. Estimates extend parcel-record counts and recorded amounts; they are not confirmed current transactions or individual-property values.

No supported recent-period estimates are available for this area. Recorded statistics above remain available.

Transaction coverage has not been verified. Known multi-parcel deals are excluded; missing package flags do not establish that every remaining sale covers one parcel. Amount change compares monthly record medians, not the appreciation of the same homes. Ranges reflect historical model errors; they are not confidence intervals and can exclude the point estimate. Assumed observation cutoff: April 2026; not a verified completeness date.

Properties in West Islip

Showing page 164 of properties

90 Arbour Street

West Islip, NY 11795

90 Babylon Avenue

West Islip, NY 11795

90 Boulevard Avenue

West Islip, NY 11795

90 Cedar Point Drive

West Islip, NY 11795

90 Dunwoodie Avenue

West Islip, NY 11795

90 Gladstone Avenue

West Islip, NY 11795

90 Gridley Street

West Islip, NY 11795

90 Haynes Avenue

West Islip, NY 11795

90 Higbie Lane

West Islip, NY 11795

90 Jean Road

West Islip, NY 11795

90 Leopold Avenue

West Islip, NY 11795

90 Merritt Street

West Islip, NY 11795

90 Oak Neck Lane

West Islip, NY 11795

90 Paris Court

West Islip, NY 11795

90 Penny Street

West Islip, NY 11795

90 Sequams Lane East

West Islip, NY 11795

90 Sherman Avenue

West Islip, NY 11795

90 Sylvia Drive

West Islip, NY 11795

90 Udalia Court

West Islip, NY 11795

90 Wagstaff Lane

West Islip, NY 11795

900 Bay Shore Avenue

West Islip, NY 11795

900 Pine Avenue

West Islip, NY 11795

900 Stanley Street

West Islip, NY 11795

900 Udall Road

West Islip, NY 11795

900 Udall Road

West Islip, NY 11795

901 Udall Road

West Islip, NY 11795

904 Bay Shore Avenue

West Islip, NY 11795

905 Stanley Street

West Islip, NY 11795

908 Bay Shore Avenue

West Islip, NY 11795

91 Anchorage Drive

West Islip, NY 11795

91 Babylon Avenue

West Islip, NY 11795

91 Cotter Street

West Islip, NY 11795

91 Doncaster Avenue

West Islip, NY 11795

91 Drake Court

West Islip, NY 11795

91 Dunwoodie Avenue

West Islip, NY 11795

91 Edmore Lane North

West Islip, NY 11795

91 Haynes Avenue

West Islip, NY 11795

91 Malts Avenue

West Islip, NY 11795

91 Mccall Avenue

West Islip, NY 11795

91 North Burling Lane

West Islip, NY 11795

91 Penny Street

West Islip, NY 11795

91 Spruce Avenue

West Islip, NY 11795

91 Sylvia Drive

West Islip, NY 11795

91 Udalia Court

West Islip, NY 11795

912 Bay Shore Avenue

West Islip, NY 11795

912 Fire Island Avenue

West Islip, NY 11795

912 Ocean Avenue

West Islip, NY 11795

913 Bay Shore Avenue

West Islip, NY 11795

913 Fire Island Avenue

West Islip, NY 11795

913 Ocean Avenue

West Islip, NY 11795

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