Boundary Atlas

ZIP code 77873: Grimes County, TX

ZIP code 77873 is in Richards (13% of residents) and Shiro (11%), in Grimes County (55%), Montgomery County (27%) and Walker County (18%), Texas. 76% of its residents live outside city limits. It is in Texas's 10th congressional district (73%) and Texas's 8th congressional district (27%). Its state senate districts are State Senate District 18 (55%), State Senate District 4 (27%) and State Senate District 5 (18%); its state house districts are State House District 12 (73%) and State House District 16 (27%).

1,450residents (2020 Census)
90.2 sq miland area
2cities and towns
2congressional districts
4voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Richards13%
Shiro11%

CountyShare of ZIP residents
Grimes County55%
Montgomery County27%
Walker County18%

Town or county subdivisionShare of ZIP residents
Anderson-Bedias CCD55%
Montgomery CCD27%
Huntsville CCD18%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 10th congressional district (TX-10)73%
Texas's 8th congressional district (TX-08)27%

This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1855%
State Senate District 427%
State Senate District 518%

State house districtShare of ZIP residents
State House District 1273%
State House District 1627%

Voting precincts

4 voting precincts overlap ZIP 77873. 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:77873")

ZIP 77873 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.