Holbrook, Massachusetts
Holbrook is a Census-designated place (an unincorporated community) in Norfolk County, Massachusetts, with 11,405 residents in 2020. It is in Massachusetts's 8th congressional district. It spans 2 state house districts. Its state senate district is Norfolk and Plymouth District.
County
| County | Share of residents |
|---|---|
| Norfolk County | 100% |
Congressional district
| Congressional district | Share of 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) | 50% | |
| State Representative (3rd Norfolk District) | Ron Mariano (Democratic) | 50% |
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 residents |
|---|---|
| Norfolk and Plymouth District | 100% |
| State house district | Share of residents |
|---|---|
| 5th Norfolk District | 50% |
| 3rd Norfolk District | 50% |
ZIP codes
Percentages mark ZIPs only partly in Holbrook: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Holbrook'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:2530420")
Holbrook 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.