ZIP code 77320: Huntsville, TX
ZIP code 77320 is in Huntsville (47% of residents), in Walker County (97%) and San Jacinto County (3.4%), Texas. 53% of its residents live outside city limits. It is in Texas's 10th congressional district (86%) and Texas's 8th congressional district (14%). Its state senate district is State Senate District 5; its state house districts are State House District 12 (97%) and State House District 18 (3.4%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Huntsville | 47% |
| Riverside | 0.6% |
| County | Share of ZIP residents |
|---|---|
| Walker County | 97% |
| San Jacinto County | 3.4% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Huntsville CCD | 54% |
| Riverside CCD | 43% |
| Point Blank CCD | 3.4% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 10th congressional district (TX-10) | 86% |
| Texas's 8th congressional district (TX-08) | 14% |
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.
Members of Congress
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (TX-10) | Michael T. McCaul (R) | 202-225-2401 | 86% |
| U.S. Representative (TX-08) | Morgan Luttrell (R) | 202-225-4901 | 14% |
| U.S. Senator | John Cornyn (R) | 202-224-2934 · contact form | statewide |
| U.S. Senator | Ted Cruz (R) | 202-224-5922 · contact form | statewide |
Elected in 2024 under TX's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 5 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 12 | 97% |
| State House District 18 | 3.4% |
Voting precincts
13 voting precincts overlap ZIP 77320. 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:77320")
ZIP 77320 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.