ZIP code 01860: Merrimac, MA
ZIP code 01860 is in Essex County, Massachusetts, outside any city or Census-designated place. It is in Massachusetts's 6th congressional district. Its state senate district is Second Essex and Middlesex District; its state house district is 1st Essex District.
See it on the mapAll of Massachusetts
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Essex County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Merrimac town | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Massachusetts's 6th congressional district (MA-06) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MA-06) | Seth Moulton (D) | 202-225-8020 | 100% |
| U.S. Senator | Edward J. Markey (D) | 202-224-2742 · contact form | statewide |
| U.S. Senator | Elizabeth Warren (D) | 202-224-4543 · contact form | statewide |
| State Senator (Second Essex and Middlesex District) | Barry Finegold (Democratic) | 100% | |
| State Representative (1st Essex District) | Dawne Shand (Democratic) | 100% |
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Essex County laws: search for the Essex County, Massachusetts code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| Second Essex and Middlesex District | 100% |
| State house district | Share of ZIP residents |
|---|---|
| 1st Essex District | 100% |
Voting precincts
2 voting precincts overlap ZIP 01860. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:01860")
ZIP 01860 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.