Boundary Atlas

Falmouth, Massachusetts

Falmouth is a Census-designated place (an unincorporated community) in Barnstable County, Massachusetts, with 3,818 residents in 2020. It is in Massachusetts's 9th congressional district. Its state senate district is Plymouth and Barnstable District; its state house district is Barnstable-Dukes-Nantucket District.

3,818residents (2020 Census)
2.1 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Barnstable County100%

Congressional district

Congressional districtShare of residents
Massachusetts's 9th congressional district (MA-09)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MA-09)William R. Keating (D)202-225-3111100%
U.S. SenatorEdward J. Markey (D)202-224-2742 · contact formstatewide
U.S. SenatorElizabeth Warren (D)202-224-4543 · contact formstatewide
State Senator (Plymouth and Barnstable District)Dylan Fernandes (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

State legislative districts

State senate districtShare of residents
Plymouth and Barnstable District100%

State house districtShare of residents
Barnstable-Dukes-Nantucket District100%

ZIP codes

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

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Your agent can get Falmouth'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:2523070")

Falmouth 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.