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Long Island Property Tax
Town · Suffolk County

Property taxes in the Town of Islip, NY

The Town of Islip in Suffolk County has 92,911 parcels across 12 school districts. The median single-family home is valued at $579,341.

Median home value
$579k
Most homes $443k to $856k
Single-family homes
83,528
of 92,911 parcels
School districts
12
serving this town
Suffolk median bill
$11,298/yr
county-wide, for context
School districts

School districts in the Town of Islip

Median bills by district. The school portion is typically 60–75% of the whole bill, so two neighbors in the same town can pay very different amounts.

  1. Brentwood17,364 parcels here $8,16217,364 parcels
  2. Connetquot12,953 parcels here $11,40812,953 parcels
  3. Central Islip9,632 parcels here $10,9809,632 parcels
  4. Bay Shore9,257 parcels here $12,2079,257 parcels
  5. West Islip8,872 parcels here $12,3548,872 parcels
  6. East Islip7,851 parcels here $11,0587,851 parcels
  7. Sachem7,577 parcels here $9,9687,577 parcels
  8. Sayville5,786 parcels here $12,8325,786 parcels
  9. Islip5,565 parcels here $12,7185,565 parcels
  10. Hauppauge3,077 parcels here $12,2513,077 parcels
  11. Bayport-Blue Point2,538 parcels here $15,1562,538 parcels
  12. Fire Island2,439 parcels here $6,0982,439 parcels

Suffolk County median, $11,298

ZIP codes

ZIP codes in the Town of Islip

Property tax figures for each ZIP code in Islip.

Questions

Frequently asked questions

What is the average property tax in the Town of Islip?

Bills in the Town of Islip vary by school district; the school portion is typically 60–75% of the bill. Use the property tax calculator for an estimate on any address.

When is the tax grievance deadline in the Town of Islip?

Suffolk County towns, including Islip, accept grievance applications through Grievance Day, the third Tuesday in May, at the town’s Board of Assessment Review. See the Islip grievance guide.

How does the Town of Islip compare with other Suffolk County towns?

Compare median bills across every Suffolk County town and district on the Long Island tax map, or see the Suffolk County overview.

Guides

More for Islip homeowners

Grieving in IslipDeadlines, forms and how the process works here. Islip tax due datesWhen each half of the bill is due, and the penalties. Look up an assessmentWhere to find the official assessment for a Islip property. Suffolk CountyMedian bills and districts county-wide.
Method

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
  • Town SWIS codes: NY State ORPTS standard codes that map municipalities to assessment rolls.

Estimates only, not professional advice. Verify with the Suffolk County Receiver of Taxes before making financial decisions.