Boundary Atlas

Westfield, Massachusetts

Westfield is a city in Hampden County, Massachusetts, with 40,834 residents in 2020. It is in Massachusetts's 1st congressional district. It spans 2 state house districts. Its state senate district is Hampden and Hampshire District.

40,834residents (2020 Census)
46.3 sq miland area
2ZIP codes
1congressional district

County

CountyShare of residents
Hampden County100%

Congressional district

Congressional districtShare of residents
Massachusetts's 1st congressional district (MA-01)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MA-01)Richard E. Neal (D)202-225-5601100%
U.S. SenatorEdward J. Markey (D)202-224-2742 · contact formstatewide
U.S. SenatorElizabeth Warren (D)202-224-4543 · contact formstatewide
State Senator (Hampden and Hampshire District)John Velis (Democratic)100%
State Representative (4th Hampden District)Kelly Pease (R)91%
State Representative (6th Hampden District)Mike Finn (Democratic)413-363-19658.7%

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
Hampden and Hampshire District100%

State house districtShare of residents
4th Hampden District91%
6th Hampden District8.7%

ZIP codes

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

Get this in your AI agent

Your agent can get Westfield'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:2576030")

Westfield here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.