ZIP code 03031: Amherst, NH
ZIP code 03031 is in Amherst (5.9% of residents), in Hillsborough County, New Hampshire. 94% of its residents live outside city limits. It is in New Hampshire's 2nd congressional district (100%) and New Hampshire's 1st congressional district (0.3%). Its state senate district is State Senate District 11; its state house districts are State House District Hillsborough 34 (100%) and State House District Hillsborough 12 (0.3%).
See it on the mapAll of New Hampshire
City and county
| City or town | Share of ZIP residents |
|---|---|
| Amherst | 5.9% |
| County | Share of ZIP residents |
|---|---|
| Hillsborough County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Amherst town | 100% |
| Merrimack town | 0.3% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| New Hampshire's 2nd congressional district (NH-02) | 100% |
| New Hampshire's 1st congressional district (NH-01) | 0.3% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 11 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District Hillsborough 34 | 100% |
| State House District Hillsborough 12 | 0.3% |
Voting precincts
2 voting precincts overlap ZIP 03031. 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:03031")
ZIP 03031 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.