Starr County, TX ZIP codes
There are 9 ZIP codes in Starr County, TX, in 9 towns, from 78536 to 78591. The largest are 78582 (Rio Grande City), 78584 (Roma) and 78591 (Santa Elena).
The county seat is Rio Grande City.
- ZIP codes
- 9
- Towns
- 9
- County seat
- Rio Grande City
- County FIPS
48427- State
- Texas
- Population
- 66,067
- Median household income
- $37,639
- Land area
- 1,223 sq mi
- Area code
- 956
- Metro area
- Rio Grande City-Roma
Starr County ZIP codes by town
- Rio Grande City (county seat)
- 78582
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Starr County ZIP codes
The ZIP codes of Starr County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Starr County in numbers
About 66,067 people live in Starr County, in 19,157 households, the 54th most populous of Texas's 254 counties. The median household income is $37,639 a year, 52% below the Texas median of $78,476 (US: $80,734). The median owner-occupied home is valued at $95,100 (66% below the Texas median), and median gross rent is $726 a month. The median age is 29.4; 13.6% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 23 minutes.
| Population | 66,067 |
|---|---|
| Households | 19,157 |
| Median age | 29.4 |
| Median household income | $37,639 |
| Median home value | $95,100 |
| Median gross rent | $726 |
| Bachelor's degree or higher | 13.6% |
| Mean commute | 22.6 min |
| Population density | 54 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Starr County
| Town | ZIP codes | Population |
|---|---|---|
| Rio Grande City | 1 | 15,396 |
| Roma | 1 | 11,545 |
| Grulla | 1 | 1,341 |
| Falcon Heights | 1 | 392 |
| San Isidro | 1 | 214 |
| Garciasville | 1 | 196 |
| Delmita | 1 | 183 |
| Santa Elena | 1 | 158 |
| Salineno | 1 | 51 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Starr County.
Not sure you are in Starr County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Starr County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
78536 | Delmita , TX | Standard | 371 | $28,393 | — |
78545 | Falcon Heights , TX | Standard | 392 | $24,550 | — |
78547 | Garciasville , TX | Standard | 306 | — | — |
78548 | Grulla , TX | Standard | 1,341 | $37,308 | $54,400 |
78582 | Rio Grande City , TX | Standard | 44,741 | $42,626 | $102,800 |
78584 | Roma , TX | Standard | 18,464 | $27,056 | $81,400 |
78585 | Salineno , TX | Standard | 0 | — | — |
78588 | San Isidro , TX | Standard | 289 | $94,821 | $52,800 |
78591 | Santa Elena , TX | Standard | 158 | $35,750 | — |
Cite this page
zipcodes.pro. “Starr County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/tx/county/starr
Underlying data is public domain or openly licensed — sources, vintages and licences.