ZIP code 02343: Holbrook, MA

ZIP code 02343 is in Holbrook, in Norfolk County, Massachusetts. It is in Massachusetts's 8th congressional district. Its state senate district is Norfolk and Plymouth District; its state house districts are 5th Norfolk District (51%) and 3rd Norfolk District (49%).

11,364residents (2020 Census)

7.0 sq miland area

1cities and towns

1congressional district

4voting precincts

See it on the map All of Massachusetts

City and county

City or town	Share of ZIP residents
Holbrook	100%

County	Share of ZIP residents
Norfolk County	100%

Town or county subdivision	Share of ZIP residents
Holbrook town	100%

Congressional district

Congressional district	Share of ZIP residents
Massachusetts's 8th congressional district (MA-08)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (MA-08)	Stephen F. Lynch (D)	202-225-8273	100%
U.S. Senator	Edward J. Markey (D)	202-224-2742 · contact form	statewide
U.S. Senator	Elizabeth Warren (D)	202-224-4543 · contact form	statewide
State Senator (Norfolk and Plymouth District)	John Keenan (Democratic)		100%
State Representative (5th Norfolk District)	Mark Cusack (Democratic)		51%
State Representative (3rd Norfolk District)	Ron Mariano (Democratic)		49%

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

Holbrook laws: search for the Holbrook, Massachusetts code of ordinances
Norfolk County website: https://www.norfolkcounty.org/
Norfolk County laws: search for the Norfolk County, Massachusetts code of ordinances

State legislative districts

State senate district	Share of ZIP residents
Norfolk and Plymouth District	100%

State house district	Share of ZIP residents
5th Norfolk District	51%
3rd Norfolk District	49%

Voting precincts

4 voting precincts overlap ZIP 02343. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

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ZIP 02343 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.