ZIP 48371 falls in Oakland County, Michigan, where we hold 55,180 parcels measured as septic county-wide and 376,100 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 48371.
ZCTA 48371 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) |
|---|---|---|---|---|
| Oakland County, Michigan | 88% | — | 55,180 | 376,100 |
| Lapeer County, Michigan | 12% | — | — | — |
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 55,180 parcels measured as septic for Oakland County, Michigan as a whole, not broken out by ZIP.
ZIP 48371 spans 2 counties: Oakland County, Michigan, Lapeer County, Michigan.