ZIP code 04478: Somerset County, ME
ZIP code 04478 is in Somerset County (99%) and Piscataquis County (0.7%), Maine, outside any city or Census-designated place. It is in Maine's 2nd congressional district. Its state senate districts are State Senate District 5 (99%) and State Senate District 4 (0.7%); its state house districts are State House District 72 (99%) and State House District 30 (0.7%).
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Somerset County | 99% |
| Piscataquis County | 0.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Northeast Somerset UT | 97% |
| Seboomook Lake UT | 1.8% |
| Northwest Piscataquis UT | 0.7% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Maine's 2nd congressional district (ME-02) | 100% |
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 5 | 99% |
| State Senate District 4 | 0.7% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 72 | 99% |
| State House District 30 | 0.7% |
Voting precincts
15 voting precincts overlap ZIP 04478. 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:04478")
ZIP 04478 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.