Rio Grande City-Roma, TX micro area ZIP codes
The Rio Grande City-Roma, TX micropolitan statistical area (CBSA 40100) covers 1 county in Texas and 9 ZIP codes.
- ZIP codes
- 9
- Population
- 66,062
- Avg. median income
- $38,200population-weighted
- Counties
- 1
Click anywhere on the map to see which ZIP code it's in.
Counties in the Rio Grande City-Roma, TX area
ZIP codes in the Rio Grande City-Roma, TX area
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 78536 | Delmita | Starr County | 371 | $28,393 | — |
| 78545 | Falcon Heights | Starr County | 392 | $24,550 | — |
| 78547 | Garciasville | Starr County | 306 | — | — |
| 78548 | Grulla | Starr County | 1,341 | $37,308 | $54,400 |
| 78582 | Rio Grande City | Starr County | 44,741 | $42,626 | $150,000 |
| 78584 | Roma | Starr County | 18,464 | $27,056 | $81,400 |
| 78585 | Salineno | Starr County | 0 | — | — |
| 78588 | San Isidro | Starr County | 289 | $94,821 | $52,800 |
| 78591 | Santa Elena | Starr County | 158 | $35,750 | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Frequently asked questions
How many ZIP codes are in the Rio Grande City-Roma, TX micro area?
9 ZIP codes, based on each ZIP code's main county.
Which counties make up the Rio Grande City-Roma, TX area?
Starr County.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).