Boundary Atlas

ZIP code 70549: Lake Arthur, LA

ZIP code 70549 is in Lake Arthur (68% of residents), in Jefferson Davis Parish (98%), Cameron Parish (1.5%) and Calcasieu Parish (0.2%), Louisiana. 32% of its residents live outside city limits. It is in Louisiana's 3rd congressional district. Its state senate district is State Senate District 25; its state house districts are State House District 37 (99%) and State House District 47 (1.5%).

3,836residents (2020 Census)
161.1 sq miland area
1cities and towns
1congressional district
8voting precincts

See it on the mapAll of Louisiana

City and county

City or townShare of ZIP residents
Lake Arthur68%

CountyShare of ZIP residents
Jefferson Davis Parish98%
Cameron Parish1.5%
Calcasieu Parish0.2%

Town or county subdivisionShare of ZIP residents
District 159%
District 236%
District 132.7%
District 41.5%
District 100.2%
District 40.2%
District 3land only

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 25100%

State house districtShare of ZIP residents
State House District 3799%
State House District 471.5%

Voting precincts

8 voting precincts overlap ZIP 70549. 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:70549")

ZIP 70549 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.