Boundary Atlas

ZIP code 29403: Charleston, SC

ZIP code 29403 is in Charleston, in Charleston County, South Carolina. It is in South Carolina's 6th congressional district. Its state senate districts are State Senate District 20 (53%) and State Senate District 42 (47%); its state house district is State House District 111.

21,363residents (2020 Census)
5.4 sq miland area
1cities and towns
1congressional district
15voting precincts

See it on the mapAll of South Carolina

City and county

City or townShare of ZIP residents
Charleston100%

CountyShare of ZIP residents
Charleston County100%

Town or county subdivisionShare of ZIP residents
Charleston Central CCD100%

Congressional district

Congressional districtShare of ZIP residents
South Carolina's 6th congressional district (SC-06)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2053%
State Senate District 4247%

State house districtShare of ZIP residents
State House District 111100%

Voting precincts

15 voting precincts overlap ZIP 29403. 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:29403")

ZIP 29403 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.