ZIP code 78621: Elgin, TX
ZIP code 78621 is in Elgin (35% of residents), in Bastrop County (71%), Travis County (24%), Williamson County (2.9%) and Lee County (2.2%), Texas. 65% of its residents live outside city limits. It is in Texas's 27th congressional district (88%), Texas's 10th congressional district (8.8%) and Texas's 17th congressional district (2.9%). Its state senate districts are State Senate District 5 (74%), State Senate District 14 (24%) and State Senate District 18 (2.2%); its state house districts are State House District 17 (73%), State House District 46 (24%) and State House District 52 (2.9%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Elgin | 35% |
| Webberville | 0.7% |
| Manor | 0.1% |
| County | Share of ZIP residents |
|---|---|
| Bastrop County | 71% |
| Travis County | 24% |
| Williamson County | 2.9% |
| Lee County | 2.2% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Elgin CCD | 71% |
| Austin CCD | 17% |
| Northeast Travis CCD | 6.8% |
| Taylor CCD | 2.9% |
| Lexington CCD | 2.2% |
| Bastrop CCD | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Texas's 27th congressional district (TX-27) | 88% |
| Texas's 10th congressional district (TX-10) | 8.8% |
| Texas's 17th congressional district (TX-17) | 2.9% |
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.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (TX-27) | Michael Cloud (R) | 202-225-7742 | 88% |
| U.S. Representative (TX-10) | Michael T. McCaul (R) | 202-225-2401 | 8.8% |
| U.S. Representative (TX-17) | Pete Sessions (R) | 202-225-6105 | 2.9% |
| U.S. Senator | John Cornyn (R) | 202-224-2934 · contact form | statewide |
| U.S. Senator | Ted Cruz (R) | 202-224-5922 · contact form | statewide |
| State Senator (State Senate District 5) | Charles Schwertner (R) | 512-863-8456 | 74% |
| State Senator (State Senate District 14) | Sarah Eckhardt (Democratic) | 24% | |
| State Senator (State Senate District 18) | Lois Kolkhorst (R) | 361-573-7300 | 2.2% |
| State Representative (State House District 17) | Stan Gerdes (R) | 512-321-3720 | 73% |
| State Representative (State House District 46) | Sheryl Cole (Democratic) | 24% | |
| State Representative (State House District 52) | Caroline Harris Davila (R) | 512-255-6612 | 2.9% |
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
- Elgin laws: search for the Elgin, Texas code of ordinances
- Bastrop County website: https://www.bastropcounty.gov/
- Bastrop County laws: search for the Bastrop County, Texas code of ordinances
- Travis County website: https://www.traviscountytx.gov/
- Travis County laws: search for the Travis County, Texas code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 5 | 74% |
| State Senate District 14 | 24% |
| State Senate District 18 | 2.2% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 17 | 73% |
| State House District 46 | 24% |
| State House District 52 | 2.9% |
Voting precincts
11 voting precincts overlap ZIP 78621. 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:78621")
ZIP 78621 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.