Zip Code 01431 — Ashby, MA
01431 is a ZIP Code associated with Ashby, MA, located within Middlesex. The postal region supports an estimated population of 3,211 residents across Data Pending housing units, with a population density of 52.4 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.676520, -71.823220)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 01431 |
| Primary City | Ashby |
| State / Province | MA |
| County | Middlesex |
| Total Population | 3,211 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 52.4 people/sq mi |
| Timezone | America/New_York |
How 01431 Compares
| Metric | ZIP 01431 | Middlesex County | MA State Average |
|---|
| Population | 3,211 | 1,629,277 | 7,043,978 |
| Median Income | Data Pending | N/A | N/A |
| Population Density | 52.4 /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 →