ZIP code 02203: Boston, MA
ZIP code 02203 is in Suffolk County, Massachusetts, outside any city or Census-designated place. It is in Massachusetts's 8th congressional district. Its state senate district is Third Suffolk District; its state house district is 3rd Suffolk District.
See it on the mapAll of Massachusetts
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Suffolk County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Boston city | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Massachusetts's 8th congressional district (MA-08) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MA-08) | Stephen F. Lynch (D) | 202-225-8273 | 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 (Third Suffolk District) | Lydia Edwards (Democratic) | 100% | |
| State Representative (3rd Suffolk District) | Aaron Michlewitz (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
- Suffolk County laws: search for the Suffolk County, Massachusetts code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| Third Suffolk District | 100% |
| State house district | Share of ZIP residents |
|---|---|
| 3rd Suffolk District | 100% |
Voting precincts
1 voting precinct overlap ZIP 02203. 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:02203")
ZIP 02203 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.