Zip Code 01860 — Merrimac, MA
01860 is a ZIP Code associated with Merrimac, MA, located within Essex. 01860 ranks #32 out of 44 ZIP codes in Essex County by population (and #307 out of 539 in MA). The area supports an estimated population of 6,748 residents across Data Pending housing units, with a population density of 306.6 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.838580, -71.011940)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 01860 |
| Primary City | Merrimac |
| State / Province | MA |
| County | Essex |
| Total Population | 6,748 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 306.6 people/sq mi |
| Timezone | America/New_York |
How 01860 Compares
| Metric | ZIP 01860 | Essex County | MA State Average |
|---|
| Population | 6,748 | 812,999 (Total) | 7,043,978 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 306.6 /sq mi | -- | -- |
| County Pop Rank | #32 of 44 | -- | -- |
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 →