ZIP 51529 falls in Harrison County, Iowa, where we hold 272 septic-related documents. We have not classified septic-versus-sewer status for this county, and we do not have a per-ZIP parcel count -- see the county page for what we hold and where the records are kept.
ZCTA 51529 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) |
|---|---|---|---|---|
| Harrison County, Iowa | 38% | 272 | — | — |
| Crawford County, Iowa | 28% | 91 | — | — |
| Monona County, Iowa | 18% | 127 | — | — |
| Shelby County, Iowa | 15% | 126 | — | — |
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 have not measured septic-versus-sewer status for this county yet.
ZIP 51529 spans 4 counties: Harrison County, Iowa, Crawford County, Iowa, Monona County, Iowa, Shelby County, Iowa.