ZIP 55910 falls in Winona County, Minnesota, where we hold 4,512 parcels measured as septic county-wide and 11,875 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 55910.
ZCTA 55910 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) |
|---|---|---|---|---|
| Winona County, Minnesota | 88% | — | 4,512 | 11,875 |
| Wabasha County, Minnesota | 12% | 10 | 4,381 | 4,969 |
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 4,512 parcels measured as septic for Winona County, Minnesota as a whole, not broken out by ZIP.
ZIP 55910 spans 2 counties: Winona County, Minnesota, Wabasha County, Minnesota.