Boundary Atlas

ZIP code 79031: Earth, TX

ZIP code 79031 is in Earth (76% of residents), in Lamb County (99%) and Castro County (0.8%), Texas. 24% of its residents live outside city limits. It is in Texas's 19th congressional district. Its state senate districts are State Senate District 28 (99%) and State Senate District 31 (0.8%); its state house district is State House District 88.

1,188residents (2020 Census)
103.1 sq miland area
1cities and towns
1congressional district
3voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Earth76%

CountyShare of ZIP residents
Lamb County99%
Castro County0.8%

Town or county subdivisionShare of ZIP residents
Earth CCD96%
Sudan-Amherst CCD3.5%
Hart CCD0.8%

Congressional district

Congressional districtShare of ZIP residents
Texas's 19th congressional district (TX-19)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2899%
State Senate District 310.8%

State house districtShare of ZIP residents
State House District 88100%

Voting precincts

3 voting precincts overlap ZIP 79031. 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:79031")

ZIP 79031 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.