ZIP 56431 falls in Aitkin County, Minnesota, where we hold 12,865 parcels measured as septic county-wide and 1,516 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 56431.
ZCTA 56431 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) |
|---|---|---|---|---|
| Aitkin County, Minnesota | 85% | 1,050 | 12,865 | 1,516 |
| Crow Wing County, Minnesota | 15% | 1,375 | 19,533 | 11,759 |
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 12,865 parcels measured as septic for Aitkin County, Minnesota as a whole, not broken out by ZIP.
ZIP 56431 spans 2 counties: Aitkin County, Minnesota, Crow Wing County, Minnesota.