ZIP 50020 falls in Cass County, Iowa, where we hold 73 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 50020 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) |
|---|---|---|---|---|
| Cass County, Iowa | 77% | 73 | — | — |
| Adair County, Iowa | 12% | 61 | — | — |
| Audubon County, Iowa | 10% | 54 | — | — |
| Guthrie County, Iowa | 1% | 343 | — | — |
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 50020 spans 4 counties: Cass County, Iowa, Adair County, Iowa, Audubon County, Iowa, Guthrie County, Iowa.