ZIP 55371 falls in Mille Lacs County, Minnesota, where we hold 7,516 parcels measured as septic county-wide and 3,649 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 55371.
ZCTA 55371 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) |
|---|---|---|---|---|
| Mille Lacs County, Minnesota | 42% | — | 7,516 | 3,649 |
| Sherburne County, Minnesota | 30% | — | 12,971 | 16,390 |
| Isanti County, Minnesota | 26% | — | 8,683 | 5,355 |
| Benton County, Minnesota | 2% | — | 4,651 | 7,278 |
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 7,516 parcels measured as septic for Mille Lacs County, Minnesota as a whole, not broken out by ZIP.
ZIP 55371 spans 4 counties: Mille Lacs County, Minnesota, Sherburne County, Minnesota, Isanti County, Minnesota, Benton County, Minnesota.