Massachusetts's 5th congressional district (MA-05)
Massachusetts's 5th congressional district (MA-05) covers parts or all of Middlesex County, Suffolk County and Norfolk County, and 35 ZIP codes (21 wholly inside it). Its 2020 population was 781,101. This is the map in force for the November 3, 2026 election.
Who represents MA-05
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (MA-05) | Katherine M. Clark (D) | 202-225-2836 |
| U.S. Senator | Edward J. Markey (D) | 202-224-2742 · contact form |
| U.S. Senator | Elizabeth Warren (D) | 202-224-4543 · contact form |
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in MA-05 |
|---|---|
| Middlesex County | 42% |
| Suffolk County | 10% |
| Norfolk County | 3.1% |
ZIP codes
Percentages mark ZIPs only partly in MA-05: the share of that ZIP's residents inside it.
- 01701
- 01702
- 01730 (4.8%)
- 01731 (93%)
- 01754
- 01760
- 01773 (99%)
- 01775 (0.2%)
- 01776
- 01778
- 01801
- 01890
- 02128 (<0.1%)
- 02138 (96%)
- 02139 (19%)
- 02140 (44%)
- 02145 (0.3%)
- 02148
- 02151 (100%)
- 02152
- 02155 (97%)
- 02176
- 02180
- 02420 (100%)
- 02421
- 02451
- 02452
- 02453
- 02472
- 02474
- 02476
- 02478
- 02481 (79%)
- 02482 (80%)
- 02493
Towns
Arlington town, Belmont town, Framingham city, Lexington town, Lincoln town, Malden city, Maynard town, Medford city, Melrose city, Natick town, Revere city, Stoneham town, Sudbury town, Waltham city, Watertown city, Wayland town, Weston town, Winchester town, Winthrop Town city, Woburn city, Wellesley town, Cambridge city and Bedford town.
Get this in your AI agent
Your agent can draw every precinct in MA-05, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:2505", children_level="precinct", include_districts=True)