Boundary Atlas

ZIP code 29940: Seabrook, SC

ZIP code 29940 is in Seabrook (32% of residents), Dale (17%), Sheldon (15%) and Lobeco (7.7%), in Beaufort County, South Carolina. 29% of its residents live outside city limits. It is in South Carolina's 1st congressional district. Its state senate district is State Senate District 45; its state house district is State House District 121.

3,789residents (2020 Census)
74.0 sq miland area
5cities and towns
1congressional district
4voting precincts

See it on the mapAll of South Carolina

City and county

City or townShare of ZIP residents
Seabrook32%
Dale17%
Sheldon15%
Lobeco7.7%
Yemassee0.6%

CountyShare of ZIP residents
Beaufort County100%

Town or county subdivisionShare of ZIP residents
Sheldon CCD68%
Beaufort-Port Royal CCD32%

Congressional district

Congressional districtShare of ZIP residents
South Carolina's 1st congressional district (SC-01)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 45100%

State house districtShare of ZIP residents
State House District 121100%

Voting precincts

4 voting precincts overlap ZIP 29940. 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:29940")

ZIP 29940 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.