Boundary Atlas

Fitchburg, Massachusetts

Fitchburg is a city in Worcester County, Massachusetts, with 41,946 residents in 2020. It is in Massachusetts's 3rd congressional district. Its state senate district is Worcester and Middlesex District; its state house district is 3rd Worcester District.

41,946residents (2020 Census)
27.8 sq miland area
2ZIP codes
1congressional district

County

CountyShare of residents
Worcester County100%

Congressional district

Congressional districtShare of residents
Massachusetts's 3rd congressional district (MA-03)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MA-03)Lori Trahan (D)202-225-3411100%
U.S. SenatorEdward J. Markey (D)202-224-2742 · contact formstatewide
U.S. SenatorElizabeth Warren (D)202-224-4543 · contact formstatewide
State Senator (Worcester and Middlesex District)John Cronin (Democratic)100%
State Representative (3rd Worcester District)Mike Kushmerek (Democratic)978-829-1954100%

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
Worcester and Middlesex District100%

State house districtShare of residents
3rd Worcester District100%

ZIP codes

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

Get this in your AI agent

Your agent can get Fitchburg'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:2523875")

Fitchburg 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.