Boundary Atlas

ZIP code 77830: Grimes County, TX

ZIP code 77830 is in Anderson (6.8% of residents), in Grimes County, Texas. 93% of its residents live outside city limits. It is in Texas's 10th congressional district. Its state senate district is State Senate District 18; its state house district is State House District 12.

2,836residents (2020 Census)
194.8 sq miland area
1cities and towns
1congressional district
5voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Anderson6.8%

CountyShare of ZIP residents
Grimes County100%

Town or county subdivisionShare of ZIP residents
Anderson-Bedias CCD86%
Navasota CCD14%

Congressional district

Congressional districtShare of ZIP residents
Texas's 10th congressional district (TX-10)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (TX-10)Michael T. McCaul (R)202-225-2401100%
U.S. SenatorJohn Cornyn (R)202-224-2934 · contact formstatewide
U.S. SenatorTed Cruz (R)202-224-5922 · contact formstatewide
State Senator (State Senate District 18)Lois Kolkhorst (R)361-573-7300100%
State Representative (State House District 12)Trey Wharton (R)936-649-0510100%

Elected in 2024 under TX's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 18100%

State house districtShare of ZIP residents
State House District 12100%

Voting precincts

5 voting precincts overlap ZIP 77830. 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:77830")

ZIP 77830 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.