Boundary Atlas

Somerset, Massachusetts

Somerset is a Census-designated place (an unincorporated community) in Bristol County, Massachusetts, with 18,303 residents in 2020. It is in Massachusetts's 4th congressional district. Its state senate district is First Bristol and Plymouth District; its state house district is 5th Bristol District.

18,303residents (2020 Census)
7.9 sq miland area
2ZIP codes
1congressional district

County

CountyShare of residents
Bristol County100%

Congressional district

Congressional districtShare of residents
Massachusetts's 4th congressional district (MA-04)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MA-04)Jake Auchincloss (D)202-225-5931100%
U.S. SenatorEdward J. Markey (D)202-224-2742 · contact formstatewide
U.S. SenatorElizabeth Warren (D)202-224-4543 · contact formstatewide
State Senator (First Bristol and Plymouth District)Michael Rodrigues (Democratic)508-646-0650100%
State Representative (5th Bristol District)Justin Thurber (R)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

State legislative districts

State senate districtShare of residents
First Bristol and Plymouth District100%

State house districtShare of residents
5th Bristol District100%

ZIP codes

Percentages mark ZIPs only partly in Somerset: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Somerset's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:2562465")

Somerset here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.