PlainZIP

San Isidro, TX · standard

ZIP Code 78588

Starr County, Texas - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

238
2/sq mi
$94,821
Median income
$52,800
Median home value
28.8%
Bachelor's or higher

The verdict

San Isidro pairs an upper-quartile household income with among the most affordable home values nationally, in a rural, homeowner-dominated area.

Top 23%
household income, US ZIPs
1th pct
home value, US ZIPs
2
people per sq mi
66%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 78588 against every reporting US ZIP.

ZIP code 78588 is a sparsely populated ZIP (a standard USPS delivery area) in San Isidro, Starr County, Texas, home to just 238 residents across 99.2 square miles, a density of 2 people per square mile, in the Chicago time zone.

ZIP 78588 lands in the middle-income range, with a median household income of $94,821 (25% above the Texas average), while per-capita income is $25,903. Local economic indicators show a 0.0% poverty rate alongside 0.0% unemployment. Housing costs here run $52,800 for a typical home value (79% below the state average), with rent averaging $520 a month; 65.7% of homes are owner-occupied.

Educational attainment sits below the national norm: 28.8% of adults hold a bachelor's degree or higher, the median age is 41.2, and the average commute is -. To put 78588 in local context, 2 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Starr County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 78588, San Isidro, TX · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

238

Population

99.2

Area (sq mi)

2

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 78588?

41.2

Median Age

49.5%

Male

50.5%

Female

6.9%

Foreign-Born

White 54.3%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 33.6%
Hispanic or Latino 88.6%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$94,821

Median Household Income

+25% vs state

$25,903

Per Capita Income

0.0%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 78588 ranks nationally

San Isidro, TX household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$94,821 Top 23% higher than 77% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). This entry sits in this band. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 33.7%
Bachelor's Degree or Higher 28.8%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

122

Total Housing Units

67

Occupied Units

55

Vacant Units

4.31

Avg Household Size

Occupancy Type

Owner 65.7%
Renter 34.3%

$52,800

Median Home Value

-79% vs state

$520

Median Rent

1998

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 6 business establishments in ZIP 78588, employing approximately 24 people with a combined annual payroll of $1,396,000.

6

Businesses

24

Employees

$1.4M

Annual Payroll

0

Industry Sectors

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 78588 vs 78536 →

ZIP 78588 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 78588 ranks #3 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
78536 Delmita, TX 451 7.0 mi
78563 Linn, TX 376 10.3 mi

More ZIP Codes in Starr County

78582 standard
Rio Grande City, TX
Pop: 40,455
78584 standard
Roma, TX
Pop: 18,128
78548 standard
Grulla, TX
Pop: 675
78545 standard
Falcon Heights, TX
Pop: 555
78536 standard
Delmita, TX
Pop: 451
78585 standard
Salineno, TX
Pop: 396

Related Areas

Starr County San Isidro, TX Texas

Frequently Asked Questions

What county is ZIP code 78588 in? ▼
ZIP code 78588 (San Isidro) is located in Starr County, Texas. Starr County contains multiple ZIP codes, see the full list at /counties/starr-tx.
What is the population of ZIP code 78588? ▼
ZIP code 78588 in San Isidro, TX has a population of 238 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 78588? ▼
The median household income in ZIP 78588 is $94,821, which is 24% above the national average of $76,288.
What is the average home value in ZIP 78588? ▼
The median home value in ZIP 78588 is $52,800, which is 81% below the national average of $278,155.
What is the demographic makeup of ZIP 78588? ▼
The largest racial group in ZIP 78588 is White at 54.3%. Hispanic or Latino residents make up 88.6% of the population.
How many businesses are in ZIP code 78588? ▼
ZIP code 78588 has 6 business establishments employing approximately 24 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 78588? ▼
In ZIP code 78588, 33.7% of residents aged 25+ have a high school diploma or higher, and 28.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 78588? ▼
In ZIP code 78588, approximately 65.7% of occupied housing units are owner-occupied and 34.3% are renter-occupied, based on Census ACS 2023 data.

Read our methodology to see how this data is sourced, computed, and verified.