Property taxes in Islip School District
Islip, NY property taxes: median bill $12,718/yr ($1,060/mo), effective rate 2.18% of home value. That’s 120% higher than the U.S. national average effective rate of 0.99%.
Within Long Island, Islip sits 14% above the regional median bill of $11,129. It ranks at the 68th percentile of 121 districts: 32% of LI districts pay more, 68% pay less.
- Median bill
- $12,718/yr
- $1,060 a month, residential
- Median home value
- $584k
- Most homes $469k to $838k
- Single-family homes
- 5,191
- of 5,565 parcels in the district
- Long Island median
- $11,129/yr
- across all 121 LI districts
Where every property tax dollar goes
Islip homeowners pay $21.78 per $1,000 of full market value in core property tax (county, town and school) for the 2024–2025 roll year, the most recent rates published by the New York State Office of Real Property Tax Services. Village, library and special-district levies stack on top where they apply.
| Levy | Rate per $1,000 | Share of base |
|---|---|---|
| School | $17.734 | 81.4% |
| Town | $2.360 | 10.8% |
| County | $1.690 | 7.8% |
| Core rate | $21.78 | 100% |
Source: NY ORPS combined county, town and school tax-rate file, roll year 2024. Rates lag 12 to 18 months because the state waits for every town and school district to certify.
How Islip compares with nearby districts
Long Island school districts vary about fivefold in median bill. Islip sits at the 68th percentile, a above-average bill, above the LI median. These are the closest Suffolk County districts by median bill.
- Eastport-South Manor $13,675
- West Babylon $13,126
- Lindenhurst $12,962
- Sayville $12,832
- Miller Place $12,796
- IslipThis district $12,718
- Deer Park $12,645
- East Moriches $12,637
- Port Jefferson $12,627
- Kings Park $12,564
- West Islip $12,354
Long Island median, $11,129
Hamlets and ZIP codes in Islip
The Islip School District covers 8 or more ZIP codes, nearly all in Suffolk County. Ranked by number of parcels.
- Islip 4,044 parcels
- Bay Shore 1,001 parcels
- Central Islip 186 parcels
- East Islip 22 parcels
- Smithtown 13 parcels
- Islip Terrace 12 parcels
- Brentwood 11 parcels
- West Islip 11 parcels
Are you a Suffolk County tax grievance firm?
5,191 homeowners in this district can challenge their assessment each year. One advertiser per district and category, no commissions.
Frequently asked questions
What is the average property tax bill in Islip?
The median residential bill is $12,718 per year ($1,060 a month). That is the median across 5,191 single-family parcels in the district. Individual bills vary with assessed value, location within the district, and any village or special-district levies that apply.
Why are property taxes higher in Islip?
Long Island property taxes reflect three layered budgets: the school district (typically 60–75% of the bill), the town and the county. In Islip, the school rate alone is $17.73 per $1,000 of full market value, roughly typical for Long Island. Districts spend different amounts per pupil, carry different debt, and serve different home-value bases.
How do I lower my property tax bill in Islip?
Two main paths. First, exemptions: STAR (every homeowner), Enhanced STAR (65+, income limit), senior, veterans and volunteer firefighter. Second, a tax grievance: if comparable homes nearby are assessed lower, file with your town’s Board of Assessment Review (Suffolk: third Tuesday in May; Nassau: by the March deadline). Grievance firms typically take 50% of the first year’s savings on contingency.
What’s a typical home value in Islip?
The median single-family home in Islip has a market value of $583,832 on the 2024 New York State assessment roll. The 10th to 90th percentile range is $468,563 to $838,323.
Is Islip a good school district?
School quality is subjective. For objective measures, see the New York State Education Department’s official report card for graduation rates, test scores and per-pupil spending. We don’t rate schools here; we cover property tax only.
Tracking Islip tax rates?
One short email when rates, exemption deadlines or grievance windows change. Nothing else.
Methodology and sources
- Parcels and assessment values: NY State Office of Real Property Tax Services (ORPTS) combined parcel file, roll year 2025. data.ny.gov
- Tax rates: NY State ORPTS county, town and school combined rate file, roll year 2024. tax.ny.gov/research/property. The state publishes final rates a year after the fact.
- Median bill: for every residential parcel we compute a projected bill as full market value × combined county, town and school rate ÷ $1,000, then take the median. This handles districts that span several towns. Village, library and special-district levies are excluded because they vary parcel by parcel.
- District name and code: NY State ORPTS school-district reference file. For official enrollment, see the NYSED report card.
Estimates only, not professional advice. Every figure is derived from public New York State data and is not a substitute for the bill your county or town receiver issues. Outcomes vary with exemptions, special assessments, village and library levies, and changes not yet in the data. Verify with the Suffolk County Receiver of Taxes before making financial decisions.