Long Island
Holtsville is a Census-designated community in Suffolk County, part of New York's Long Island region, with about 19,000 residents at the 2020 census. Its Census boundary is used for statistics; it is not an incorporated village or a municipal government.
How Holtsville works
Usually, the street address chooses among the towns of Brookhaven and Islip. Holtsville crosses municipal lines, and a Census-designated place is a statistical community, not a separate city, town, or village government.
Holtsville is mapped so the Census Bureau can publish useful local statistics. The government crosswalk shows that it crosses the towns of Brookhaven and Islip. Use the exact address to choose the right municipality and county.
Building, zoning, local code, assessment, and tax-payment work follows the city or town that serves the parcel. The post office name or CDP name does not prove which counter owns the form.
The current state tax-rate data connects Holtsville with 28 school districts, including Riverhead, Shoreham-Wading River, Bayport-Blue Point, and 25 more. District boundaries can cross municipal lines, so the exact address decides enrollment and the school-tax part of the bill.
A mailing name helps locate the community, but the school district, fire or special district, county, and governing municipality each use their own boundary. The county clerk keeps the recorded deed for the parcel's county.
Ordinary example
They do not look for a Holtsville village office. They use the street address to choose among the towns of Brookhaven and Islip, then use the responsible municipality for building or assessment work, the county clerk for the deed, and the school district for enrollment.
Property tax snapshot
The FY2025 state rows for Brookhaven town / Islip town combine county + parent town/city + school district on a full-value basis. On a $300,000 home, that base is about $1,583–$7,277 a year before STAR, exemptions, and special-district charges.
This Census place has no municipal government of its own. The exact address decides which parent government and school-district rows apply. Treat this as a route to the right records, not a bill estimate for a specific parcel.
Local government
A census-designated place is a named community for Census purposes, not a separate incorporated municipal government. The city or town layer is the practical local-government starting point.
City or town relationship
The Census relationship is geographic. It tells you which city or town overlaps this place; the official municipal pages still control the current division of services.
Holtsville is a Census place that crosses more than one municipality. Match the street address to its city or town before using a form, fee, deadline, or tax office.
Assessment, exemptions, and grievance
Assessment guideThis is the office that owns the assessed-value record and local exemption file.
Clerk, licenses, and municipal records
Marriage guideUse the clerk for the records and licenses this government actually keeps. A village clerk does not automatically own the town's marriage-license work.
Building, zoning, and land use
Project guideStart here for local permits, inspections, zoning, and code questions. County health, wetlands, shoreline, or park review can still add another office.
Property-tax bills and payments
Match the office to the bill in hand. Village, town or city, county, and school taxes do not always use the same collector.
The listed official office routes were individually reviewed, most recently on July 13, 2026. Confirm current forms, fees, hours, and deadlines with the office before acting.
County records and estate court
Deeds and mortgages usually route through the county clerk outside NYC. Probate and administration route through the county Surrogate's Court.
Municipal relationships: U.S. Census Bureau 2020 New York Block Assignment Files. Census source. Confirm current responsibilities on the official village, city, town, and county pages before acting.
Official starting points
Direct official office pages. Reviewed 2026-07-13; confirm current forms, hours, and deadlines before acting.
Local stories & notes
Short, sourced notes tied to this place, its county, or nearby communities.
Nearby · History & Culture
Centereach's older New Village name and the later Middle Country identity explain a community organized around roads, schools, and neighboring Selden.
Read this note ->Nearby · History & Culture
Patchogue's village color comes through its Main Street theater, restored performance life, waterfront village setting, and local center role.
Read this note ->Suffolk County · Home & Property
Commack crosses two town governments, so the street address must be matched before choosing a local office or form.
Read this note ->Nearby
Census place (CDP) · Suffolk County · 26,487
Census place (CDP) · Suffolk County · 14,983
Census place (CDP) · Suffolk County · 6,751
Census place (CDP) · Suffolk County · 24,247
Village · Suffolk County · 12,408
Census place (CDP) · Suffolk County · 18,619
Tax rates: NYS Dept of Taxation & Finance (ORPTS), Real Property Tax Rates and Levy Data by Municipality, data.ny.gov dataset iq85-sdzs. (FY2025). Population: U.S. Census 2020. Source data ->
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