ZIP code 03057: Mont Vernon, NH
ZIP code 03057 is in Hillsborough County, New Hampshire, outside any city or Census-designated place. It is in New Hampshire's 2nd congressional district. Its state senate district is State Senate District 9; its state house district is State House District Hillsborough 42.
See it on the mapAll of New Hampshire
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Hillsborough County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Mont Vernon town | 99% |
| Lyndeborough town | 1.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| New Hampshire's 2nd congressional district (NH-02) | 100% |
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 9 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District Hillsborough 42 | 100% |
Voting precincts
2 voting precincts overlap ZIP 03057. 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:03057")
ZIP 03057 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.