ZIP 11971 falls in Suffolk County, New York, where we hold 355,991 parcels measured as septic county-wide and 108,182 on sewer. We do not have a per-ZIP parcel count for this county, so this is the county total, not a count specific to ZIP 11971.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Suffolk County, New York | 100% | 64 | 355,991 | 108,182 |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We hold 355,991 parcels measured as septic for Suffolk County, New York as a whole, not broken out by ZIP.
ZIP 11971 falls in Suffolk County, New York.