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 Low-density area
- $94,821
- Median income Above-median income area
- $52,800
- Median home value Below-median home value
- 28.8%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
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
- 1st 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 average Texas ZIP), while per-capita income is $25,903. Both reported hardship measures are comparatively low in absolute terms: poverty is 0.0% and unemployment is 0.0%. Home values sit below the statewide ZIP benchmark: the median is $52,800 (79% below the average Texas ZIP), and median rent is $520; owner occupancy is 65.7%.
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 -. The page also surfaces 2 ZIP codes within roughly 10 miles and 6 more in Starr County, so 78588 can be compared with both its immediate and county-level context.
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
Who lives in ZIP 78588?
41.2
Median Age
49.5%
Male
50.5%
Female
6.9%
Foreign-Born
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 ZIP avg
$25,903
Per Capita Income
0.0%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 78588 ranks among Texas ZIPs
San Isidro, TX household income vs. every Texas ZIP code
Median household income among 1,737 reporting Texas ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$94,821 Top 19% higher than 81% of 1,737 Texas ZIPs
Each bar is a $20K-wide band; taller bars hold more Texas 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
122housing units
122
Total Housing Units
67
Occupied Units
55
Vacant Units
4.31
Avg Household Size
Occupancy Type
$52,800
Median Home Value
-79% vs state ZIP avg
$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.
- 78536
Delmita (78536)
451 residents
- 78563
Linn (78563)
376 residents
- 78588
San Isidro (78588)
238 residents
What this shows Among its immediate neighbors, ZIP 78588 ranks #3 by population - useful context the national average alone can't give.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 78588, both outside TX so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Starr County
Related Areas
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.
Related
Take this with you
What to do with ZIP 78588's numbers, next.
- See how ZIP 78588 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where San Isidro, TX ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.