Zip Code 54858 — Milltown, WI
54858 is a ZIP Code associated with Milltown, WI, located within Polk. 54858 ranks #12 out of 14 ZIP codes in Polk County by population (and #523 out of 783 in WI). The area supports an estimated population of 1,636 residents across Data Pending housing units, with a population density of 35.9 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (45.518240, -92.460310)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 54858 |
| Primary City | Milltown |
| State / Province | WI |
| County | Polk |
| Total Population | 1,636 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 35.9 people/sq mi |
| Timezone | America/Chicago |
How 54858 Compares
| Metric | ZIP 54858 | Polk County | WI State Average |
|---|
| Population | 1,636 | 47,347 (Total) | 5,914,913 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 35.9 /sq mi | -- | -- |
| County Pop Rank | #12 of 14 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →