Boundary Atlas

ZIP code 04348: Jefferson, ME

ZIP code 04348 is in Lincoln County, Maine, outside any city or Census-designated place. It is in Maine's 1st congressional district. Its state senate district is State Senate District 13; its state house districts are State House District 47 (81%) and State House District 62 (19%).

3,152residents (2020 Census)
75.3 sq miland area
0cities and towns
1congressional district
3voting precincts

See it on the mapAll of Maine

City and county

Outside any city or Census-designated place.


CountyShare of ZIP residents
Lincoln County100%

Town or county subdivisionShare of ZIP residents
Jefferson town81%
Somerville town19%
Hibberts gore<0.1%

Congressional district

Congressional districtShare of ZIP residents
Maine's 1st congressional district (ME-01)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 13100%

State house districtShare of ZIP residents
State House District 4781%
State House District 6219%

Voting precincts

3 voting precincts overlap ZIP 04348. 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:04348")

ZIP 04348 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.