ZIP 35173 falls in Jefferson County, Alabama, where we hold 72,264 parcels measured as septic county-wide and 154,234 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 35173.
ZCTA 35173 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) |
|---|---|---|---|---|
| Jefferson County, Alabama | 76% | 26 | 72,264 | 154,234 |
| St. Clair County, Alabama | 24% | — | — | — |
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 72,264 parcels measured as septic for Jefferson County, Alabama as a whole, not broken out by ZIP.
ZIP 35173 spans 2 counties: Jefferson County, Alabama, St. Clair County, Alabama.