ZIP code 01862: Billerica, MA
ZIP code 01862 is in Middlesex County, Massachusetts, outside any city or Census-designated place. It is in Massachusetts's 3rd congressional district (98%) and Massachusetts's 6th congressional district (2.1%). Its state senate districts are Fourth Middlesex District (98%) and Second Essex and Middlesex District (2.1%); its state house districts are 22nd Middlesex District (98%) and 19th Middlesex District (2.1%).
See it on the mapAll of Massachusetts
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Middlesex County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Billerica town | 98% |
| Tewksbury town | 2.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Massachusetts's 3rd congressional district (MA-03) | 98% |
| Massachusetts's 6th congressional district (MA-06) | 2.1% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MA-03) | Lori Trahan (D) | 202-225-3411 | 98% |
| U.S. Representative (MA-06) | Seth Moulton (D) | 202-225-8020 | 2.1% |
| 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 (Fourth Middlesex District) | Cindy Friedman (Democratic) | 98% | |
| State Senator (Second Essex and Middlesex District) | Barry Finegold (Democratic) | 2.1% | |
| State Representative (22nd Middlesex District) | Marc Lombardo (R) | 98% | |
| State Representative (19th Middlesex District) | Dave Robertson (Democratic) | 2.1% |
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
- Middlesex County laws: search for the Middlesex County, Massachusetts code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| Fourth Middlesex District | 98% |
| Second Essex and Middlesex District | 2.1% |
| State house district | Share of ZIP residents |
|---|---|
| 22nd Middlesex District | 98% |
| 19th Middlesex District | 2.1% |
Voting precincts
6 voting precincts overlap ZIP 01862. 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:01862")
ZIP 01862 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.