Boundary Atlas

ZIP code 77458: Midfield, TX

ZIP code 77458 is in Midfield (90% of residents), in Matagorda County, Texas. 10% of its residents live outside city limits. It is in Texas's 27th congressional district. Its state senate district is State Senate District 17; its state house district is State House District 30.

397residents (2020 Census)
21.9 sq miland area
1cities and towns
1congressional district
1voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Midfield90%

CountyShare of ZIP residents
Matagorda County100%

Town or county subdivisionShare of ZIP residents
Tidehaven CCD100%

Congressional district

Congressional districtShare of ZIP residents
Texas's 27th congressional district (TX-27)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 17100%

State house districtShare of ZIP residents
State House District 30100%

Voting precincts

1 voting precinct overlap ZIP 77458. Map them, with each precinct's share of the ZIP's residents.

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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:77458")

ZIP 77458 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.