Property taxes in Holtsville, NY 11742

ZIP 11742 (Holtsville) contains 3,791 parcels in Suffolk County, including 3,107 single-family homes. The median home value is $596,875.

Median home value

$597k

P10 $411k · P90 $873k

Single-family parcels

3,107

of 3,791 total

School districts in ZIP

serving residents here

School districts in ZIP 11742

Residents in Holtsville (11742) are zoned across these school districts. The school portion of property tax is typically 60-75% of the total bill.

Sachem $9,968/yr · 3,624 parcels
Patchogue-Medford $10,225/yr · 69 parcels
William Floyd $6,696/yr · 11 parcels
Middle Country $10,600/yr · 10 parcels
Riverhead $8,948/yr · 10 parcels

Towns covered by ZIP 11742

Brookhaven 2,939 parcels
Islip 817 parcels
Riverhead 12 parcels
Babylon 10 parcels
Southold 6 parcels

Frequently asked questions

What is the average property tax in Holtsville, NY 11742?

Property tax in ZIP 11742 varies by school district. The biggest factor is which school district your home falls into — within a ZIP, bills can vary 2-3x. Use the property tax calculator to get an exact estimate for any address.

What county is ZIP 11742 in?

ZIP 11742 falls within Suffolk County.

How do I lower property taxes in this ZIP?

File for exemptions (STAR, Enhanced STAR, Senior, Veterans) and consider a tax grievance if comparable homes nearby are assessed lower than yours.

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Methodology & sources

Parcels and assessment values: NY State Office of Real Property Services (ORPS) combined parcel file, roll year 2025.
ZIP-hamlet mapping: USPS ZIP code area + LI hamlet locality database.

Estimates only — not professional advice.