ZIP 49230 falls in Jackson County, Michigan, where we hold 23,247 parcels measured as septic county-wide and 33,495 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 49230.
ZCTA 49230 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) |
|---|---|---|---|---|
| Jackson County, Michigan | 73% | 1 | 23,247 | 33,495 |
| Lenawee County, Michigan | 27% | 8 | — | — |
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 23,247 parcels measured as septic for Jackson County, Michigan as a whole, not broken out by ZIP.
ZIP 49230 spans 2 counties: Jackson County, Michigan, Lenawee County, Michigan.