Chelsea, Massachusetts
Chelsea is a city in Suffolk County, Massachusetts, with 40,787 residents in 2020. It is in Massachusetts's 7th congressional district. Its state senate district is Middlesex and Suffolk District; its state house district is 11th Suffolk District.
County
| County | Share of residents |
|---|---|
| Suffolk County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Massachusetts's 7th congressional district (MA-07) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MA-07) | Ayanna Pressley (D) | 202-225-5111 | 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 (Middlesex and Suffolk District) | Sal DiDomenico (Democratic) | 100% | |
| State Representative (11th Suffolk District) | Judith García (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
- Chelsea website: http://www.chelseama.gov/
- Chelsea laws: search for the Chelsea, Massachusetts code of ordinances
- Suffolk County laws: search for the Suffolk County, Massachusetts code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| Middlesex and Suffolk District | 100% |
| State house district | Share of residents |
|---|---|
| 11th Suffolk District | 100% |
ZIP codes
Percentages mark ZIPs only partly in Chelsea: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Chelsea'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:2513205")
Chelsea 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.