ZIP code 01503: Berlin, MA
ZIP code 01503 is in Worcester County, Massachusetts, outside any city or Census-designated place. It is in Massachusetts's 3rd congressional district. Its state senate district is First Worcester District; its state house district is 12th Worcester District.
See it on the mapAll of Massachusetts
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Worcester County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Berlin town | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Massachusetts's 3rd congressional district (MA-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MA-03) | Lori Trahan (D) | 202-225-3411 | 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 (First Worcester District) | Robyn Kennedy (Democratic) | 100% | |
| State Representative (12th Worcester District) | Meg Kilcoyne (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
- Worcester County laws: search for the Worcester County, Massachusetts code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| First Worcester District | 100% |
| State house district | Share of ZIP residents |
|---|---|
| 12th Worcester District | 100% |
Voting precincts
1 voting precinct overlap ZIP 01503. 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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:01503")
ZIP 01503 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.