ZIP code 01824: Chelmsford, MA
ZIP code 01824 is in Middlesex County, Massachusetts, outside any city or Census-designated place. It is in Massachusetts's 3rd congressional district. Its state senate districts are Third Middlesex District (100%) and Worcester and Middlesex District (<0.1%); its state house districts are 14th Middlesex District (62%), 2nd Middlesex District (23%) and 16th Middlesex District (15%).
See it on the mapAll of Massachusetts
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Middlesex County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Chelmsford town | 100% |
| Westford town | <0.1% |
| Lowell city | land only |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Massachusetts's 3rd congressional district (MA-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MA-03) | Lori Trahan (D) | 202-225-3411 | 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 (Third Middlesex District) | Mike Barrett (Democratic) | 100% | |
| State Senator (Worcester and Middlesex District) | John Cronin (Democratic) | <0.1% | |
| State Senator (First Middlesex District) | Vanna Howard (Democratic) | <0.1% | |
| State Representative (14th Middlesex District) | Simon Cataldo (Democratic) | 62% | |
| State Representative (2nd Middlesex District) | Jim Arciero (Democratic) | 23% | |
| State Representative (18th Middlesex District) | Tara Hong (Democratic) | 978-226-8964 | <0.1% |
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
- Middlesex County laws: search for the Middlesex County, Massachusetts code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| Third Middlesex District | 100% |
| Worcester and Middlesex District | <0.1% |
| First Middlesex District | land only |
| State house district | Share of ZIP residents |
|---|---|
| 14th Middlesex District | 62% |
| 2nd Middlesex District | 23% |
| 16th Middlesex District | 15% |
| 18th Middlesex District | land only |
Voting precincts
11 voting precincts overlap ZIP 01824. 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:
related_geographies(id="us:zcta:01824")
ZIP 01824 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.