Boundary Atlas

ZIP code 78595: Sullivan City, TX

ZIP code 78595 is in Sullivan City (62% of residents), in Hidalgo County (99%) and Starr County (1.1%), Texas. 38% of its residents live outside city limits. It is in Texas's 28th congressional district. Its state senate districts are State Senate District 20 (99%) and State Senate District 21 (1.1%); its state house districts are State House District 35 (99%) and State House District 31 (1.1%).

6,304residents (2020 Census)
30.5 sq miland area
1cities and towns
1congressional district
3voting precincts

See it on the mapAll of Texas

City and county

City or townShare of ZIP residents
Sullivan City62%

CountyShare of ZIP residents
Hidalgo County99%
Starr County1.1%

Town or county subdivisionShare of ZIP residents
Sullivan City CCD99%
La Grulla CCD1.1%

Congressional district

Congressional districtShare of ZIP residents
Texas's 28th congressional district (TX-28)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (TX-28)Henry Cuellar (D)202-225-1640100%
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 20)Chuy Hinojosa (Democratic)361-882-090099%
State Senator (State Senate District 21)Judith Zaffirini (Democratic)956-722-22931.1%
State Representative (State House District 35)Oscar Longoria (Democratic)956-797-210199%
State Representative (State House District 31)Ryan Guillen (R)1.1%

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 2099%
State Senate District 211.1%

State house districtShare of ZIP residents
State House District 3599%
State House District 311.1%

Voting precincts

3 voting precincts overlap ZIP 78595. Map them, with each precinct's share of the ZIP's residents.

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ZIP 78595 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.