Boundary Atlas

ZIP code 28640: Jefferson, NC

ZIP code 28640 is in Jefferson (35% of residents), in Ashe County (100%) and Wilkes County (0.1%), North Carolina. 65% of its residents live outside city limits. It is in North Carolina's 5th congressional district. Its state senate districts are State Senate District 47 (100%) and State Senate District 36 (0.1%); its state house districts are State House District 93 (100%) and State House District 94 (0.1%).

4,622residents (2020 Census)
37.1 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of North Carolina

City and county

City or townShare of ZIP residents
Jefferson35%

CountyShare of ZIP residents
Ashe County100%
Wilkes County0.1%

Town or county subdivisionShare of ZIP residents
Jefferson township82%
Peak Creek township9.9%
Obids township6.2%
West Jefferson township1.0%
Walnut Hill township0.4%
Union township0.1%

Congressional district

Congressional districtShare of ZIP residents
North Carolina's 5th congressional district (NC-05)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 47100%
State Senate District 360.1%

State house districtShare of ZIP residents
State House District 93100%
State House District 940.1%

Voting precincts

6 voting precincts overlap ZIP 28640. 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:28640")

ZIP 28640 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.