Boundary Atlas

ZIP code 76233: Collinsville, TX

ZIP code 76233 is in Collinsville (49% of residents), in Grayson County (85%) and Cooke County (15%), Texas. 51% of its residents live outside city limits. It is in Texas's 4th congressional district (85%) and Texas's 26th congressional district (15%). Its state senate district is State Senate District 30; its state house districts are State House District 62 (85%) and State House District 68 (15%).

3,719residents (2020 Census)
60.3 sq miland area
1cities and towns
2congressional districts
5voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Collinsville49%

CountyShare of ZIP residents
Grayson County85%
Cooke County15%

Town or county subdivisionShare of ZIP residents
Southwest Grayson CCD84%
Gainesville Southeast CCD15%
Northwest Grayson CCD0.7%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 4th congressional district (TX-04)85%
Texas's 26th congressional district (TX-26)15%

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 30100%

State house districtShare of ZIP residents
State House District 6285%
State House District 6815%

Voting precincts

5 voting precincts overlap ZIP 76233. 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:76233")

ZIP 76233 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.