Boundary Atlas

ZIP code 70342: Berwick, LA

ZIP code 70342 is in Berwick (99% of residents), in St. Mary Parish, Louisiana. It is in Louisiana's 3rd congressional district. Its state senate district is State Senate District 21; its state house district is State House District 50.

4,806residents (2020 Census)
7.5 sq miland area
1cities and towns
1congressional district
4voting precincts

See it on the mapAll of Louisiana

City and county

City or townShare of ZIP residents
Berwick99%

CountyShare of ZIP residents
St. Mary Parish100%

Town or county subdivisionShare of ZIP residents
District 665%
District 833%
District 42.2%

Congressional district

Congressional districtShare of ZIP residents
Louisiana's 3rd congressional district (LA-03)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 21100%

State house districtShare of ZIP residents
State House District 50100%

Voting precincts

4 voting precincts overlap ZIP 70342. 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:70342")

ZIP 70342 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.