ZIP 55421 falls in Anoka County, Minnesota, where we hold 20,189 parcels measured as septic county-wide and 83,190 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 55421.
ZCTA 55421 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) |
|---|---|---|---|---|
| Anoka County, Minnesota | 92% | — | 20,189 | 83,190 |
| Ramsey County, Minnesota | 7% | — | 1,373 | 145,312 |
| Hennepin County, Minnesota | 0% | 25 | 7,879 | 372,293 |
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 20,189 parcels measured as septic for Anoka County, Minnesota as a whole, not broken out by ZIP.
ZIP 55421 spans 3 counties: Anoka County, Minnesota, Ramsey County, Minnesota, Hennepin County, Minnesota.