Boundary Atlas

ZIP code 77990: Tivoli, TX

ZIP code 77990 is in Tivoli (63% of residents), in Refugio County (87%) and Calhoun County (13%), Texas. 37% of its residents live outside city limits. It is in Texas's 27th congressional district (95%) and Texas's 15th congressional district (4.7%). Its state senate district is State Senate District 18; its state house district is State House District 43.

661residents (2020 Census)
133.2 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
Tivoli63%

CountyShare of ZIP residents
Refugio County87%
Calhoun County13%

Town or county subdivisionShare of ZIP residents
Austwell-Tivoli CCD85%
Seadrift CCD13%
Refugio CCD2.3%

Congressional districts

Congressional districtShare of ZIP residents
Texas's 27th congressional district (TX-27)95%
Texas's 15th congressional district (TX-15)4.7%

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

OfficeMemberContactShare of residents
U.S. Representative (TX-27)Michael Cloud (R)202-225-774295%
U.S. Representative (TX-15)Monica De La Cruz (R)202-225-99014.7%
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 43)J.M. Lozano (R)100%

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 43100%

Voting precincts

5 voting precincts overlap ZIP 77990. 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:77990")

ZIP 77990 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.