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County ZIP codes · Texas · FIPS 48427

Starr County, TX ZIP Codes

Starr County, Texas has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 9 of the residential ones lie mainly in Starr County and 1 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $27,056 in 78584 (Roma) to $42,626 in 78582 (Rio Grande City) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Starr County?

78536 · Delmita: $28k78545 · Falcon Heights: $25k78547 · Garciasville: –78548 · Grulla: $37k78582 · Rio Grande City: $43k78584 · Roma: $27k78585 · Salineno: –78588 · San Isidro: $95k78591 · Santa Elena: $36k78595 · Sullivan City: $59k785827858478591785457853678588785957854878536 · Delmita: $28k78545 · Falcon Heights: $25k78547 · Garciasville: –78548 · Grulla: $37k78582 · Rio Grande City: $43k78584 · Roma: $27k78585 · Salineno: –78588 · San Isidro: $95k78591 · Santa Elena: $36k78595 · Sullivan City: $59k7858278584785917854578536785887859578536 · Delmita: $28k78545 · Falcon Heights: $25k78547 · Garciasville: –78548 · Grulla: $37k78582 · Rio Grande City: $43k78584 · Roma: $27k78585 · Salineno: –78588 · San Isidro: $95k78591 · Santa Elena: $36k78595 · Sullivan City: $59k7858278584785917854578588
The residential ZIP codes of Starr County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 10 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 10 residential ZIP codes in Starr County

9 ZIP codes lie mainly in Starr County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Starr County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
78582 Rio Grande City 44,741 79 $43k $103k 100%
78584 Roma 18,464 87 $27k $81k 100%
78548 Grulla 1,341 179 $37k $54k 100%
78545 Falcon Heights 392 18 $25k – 69%
78536 Delmita 371 8 $28k – 100%
78547 Garciasville 306 163 – – 100%
78588 San Isidro 289 8 $95k $53k 100%
78591 Santa Elena 158 1 $36k – 100%
78585 Salineno no residents 0 – – 100%

Partly in Starr County

Residential ZIP codes mainly in another county that reach at least 1% into Starr County, by their share here
In this county
78595 Sullivan City 6,118 200 $59k $89k 22%

Download the 10 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

2 ZIP codes of Starr County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Starr County and in the neighboring counties
ZIPIn StarrElsewhere
7859522%Hidalgo County 78%
7854569%Zapata County 31%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Starr County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Starr County starts with 785.

Three-digit prefixes of Starr County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Starr County's
PrefixSectional centerHereAll codes
785 McAllen, TX (SCF 785) 10 68

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.