ZIP 12847 falls in Hamilton County, New York, where we hold 4,959 parcels measured as septic county-wide and 583 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 12847.
ZCTA 12847 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Hamilton County, New York | 92% | — | 4,959 | 583 |
| St. Lawrence County, New York | 8% | 155 | 24,479 | 12,794 |
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 4,959 parcels measured as septic for Hamilton County, New York as a whole, not broken out by ZIP.
ZIP 12847 spans 2 counties: Hamilton County, New York, St. Lawrence County, New York.