Zip Code 28756 — Mill Spring, NC
28756 is a ZIP Code associated with Mill Spring, NC, located within Polk. The postal region supports an estimated population of 4,706 residents across Data Pending housing units, with a population density of 22.9 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (35.342560, -82.182190)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 28756 |
| Primary City | Mill Spring |
| State / Province | NC |
| County | Polk |
| Total Population | 4,706 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 22.9 people/sq mi |
| Timezone | America/New_York |
How 28756 Compares
| Metric | ZIP 28756 | Polk County | NC State Average |
|---|
| Population | 4,706 | 20,752 | 10,730,463 |
| Median Income | Data Pending | N/A | N/A |
| Population Density | 22.9 /sq mi | -- | -- |
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 →