ZIP code 13404: Martinsburg, NY
ZIP code 13404 is in Lewis County, New York, outside any city or Census-designated place. It is in New York's 21st congressional district. Its state senate district is State Senate District 49; its state house district is Assembly District 117.
See it on the mapAll of New York
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Lewis County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Martinsburg town | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| New York's 21st congressional district (NY-21) | 100% |
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 49 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 117 | 100% |
Voting precincts
1 voting precinct overlap ZIP 13404. 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:13404")
ZIP 13404 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.