San Isidro ZIP Code List — Starr County, TX

There is one unique ZIP code in San Isidro, Texas and it is 78588. Area code: 956.

ZIP codes

36.62

sq mi land

0.00

sq mi water

956

area code

San Isidro, TX ZIP code map

About San Isidro, TX

San Isidro, Texas, is a small, vibrant community located in Starr County. Known for its close-knit atmosphere, this town is a representative example of life in South Texas. With a rich cultural heritage, it offers visitors and residents alike a glimpse into the traditions of the region.

Location & geography

San Isidro is located in the southern part of Texas, comfortably nestled in Starr County. It enjoys proximity to several notable cities, including Rio Grande City, which is approximately 12 miles to the northwest, and McAllen, roughly 30 miles to the southeast. The land area of San Isidro spans 36.62 square miles, and it is completely devoid of water bodies, providing a flat and arid terrain characteristic of the region.

Community & economy

The community of San Isidro is characterized by its predominantly agricultural lifestyle, with many residents engaged in farming and related industries. Daily life in San Isidro revolves around local events and gatherings, reflecting the strong sense of community pride. The town’s culture is heavily influenced by its Hispanic heritage, showcasing vibrant festivals and traditions that celebrate local history and familial connections.

Transportation

San Isidro is accessible via major highways, including U.S. Route 83, which connects it to larger metropolitan areas. The nearest named airport is McAllen Miller International Airport, located about 30 miles away, providing regional air service for residents and visitors. Public transit options are limited, emphasizing the reliance on personal vehicles for transportation.

History

San Isidro was founded as a community that supports the agricultural activities in the region, which have historically been the backbone of its economy. Over the years, this quiet town has witnessed various developments, though it remains primarily focused on farming and agriculture. Notable events in its history include the establishment of community festivals that celebrate local culture and traditions.

Did you know?

One surprising fact about San Isidro is that its population, while small, is notable for its strong connection to agricultural practices that are pivotal in maintaining the local economy. Despite its size, the town plays an important role in preserving the cultural heritage of Starr County.

ZIP codes for San Isidro, TX (1)

ZIP code	City	County	Map
78588	San Isidro	Starr	View map

Demographics & statistics

124

Population

52.2

Median age

Median household income

$22,016

Per capita income

$22,700

Median home value

Median monthly rent

70.5%

Home ownership

10.5%

Poverty rate

0.0%

Unemployment

Housing units

18.1%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

25–34

35–44

45–54

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	30	24.2%
18 and over	94	75.8%
65 and over	38	30.6%
Median age	52.2 years

Race & ethnicity

Hispanic or Latino 34.7%

White 30.5%

Other race 18.9%

Two or more races 15.8%

Group	Count	%
Hispanic or Latino	66	34.7%
White	58	30.5%
Other race	36	18.9%
Two or more races	30	15.8%

Household income

Under $10k 11.4%

$10k–$15k 4.5%

$15k–$25k 27.3%

$35k–$50k 20.5%

$75k–$100k 6.8%

$100k–$150k 29.5%

Range	% of households
Under $10k	11.4%
$10k–$15k	4.5%
$15k–$25k	27.3%
$35k–$50k	20.5%
$75k–$100k	6.8%
$100k–$150k	29.5%
Median income	$0

Housing

Home values

Under $50k 100.0%

Housing overview

Metric	Value
Median home value	$22,700
Median rent / month	$0
Owner occupied	70.5%
Renter occupied	29.5%
Vacant	55.1%
Single-family detached	80.6%
Large apartment buildings	0.0%
Mobile homes	9.2%
Median rooms	5.2
Avg household size (owned)	2.87

Year built

Era	%
2020 or later	0.0%
2010–2019	5.1%
2000–2009	26.5%
1990–1999	12.2%
1980–1989	0.0%
1970–1979	0.0%
1960–1969	24.5%
1950–1959	23.5%
1940–1949	8.2%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	3.1%
2 bedrooms	26.5%
3 bedrooms	31.6%
4 bedrooms	36.7%
5+ bedrooms	2.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	68.2%
2 vehicles	27.3%
3 or more	4.5%

Heating fuel

Fuel type	%
Electricity	88.6%
Propane / LP gas	11.4%

Households & families

Household type	Count	%
Married-couple family	5	11.4%
Cohabiting couple	0	0.0%
Male householder, no spouse	9	20.5%
Female householder, no spouse	30	68.2%
Households with children under 18	15	34.1%
Households with seniors (65+)	22	50.0%
Average household size	2.82

Marital status

Status	Male	Female
Never married	65.1%	46.0%
Married	14.0%	6.3%
Separated	0.0%	0.0%
Widowed	0.0%	47.6%
Divorced	20.9%	0.0%

Education

Less than 9th grade 14.9%

Some HS, no diploma 2.1%

HS graduate 19.1%

Some college, no degree 39.4%

Associate's degree 6.4%

Bachelor's degree 4.3%

Graduate / professional 13.8%

Metric	%
HS diploma or higher	83.0%
Bachelor's or higher	18.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	1	3.4%
Kindergarten	0	0.0%
Elementary school	16	55.2%
High school	12	41.4%
College / grad school	0	0.0%

Employment

Industry of employment

Education & healthcare 89.5%

Agriculture & mining 10.5%

Occupation

Category	%
Management, business & arts	89.5%
Service	0.0%
Sales & office	0.0%
Natural resources & construction	0.0%
Production & transportation	10.5%

Employment type

Type	%
Private sector	15.8%
Government	73.7%
Self-employed	10.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	10.5%
Carpool	0.0%
Public transit	0.0%
Walk	89.5%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 10.5%

Under 18 years 0.0%

18 and over 13.8%

Married-couple families 0.0%

Female-led households 18.5%

Income support

Source	% of households
Social Security	50.0%
Retirement income	52.3%
Supplemental Security	4.5%
Cash public assistance	0.0%
Food stamps / SNAP	27.3%

Health indicators

Condition	%
High blood pressure	41.9%
High cholesterol	40.7%
Heart disease	9.0%
Stroke	3.9%
Asthma	8.4%
Arthritis	26.3%
Kidney disease	4.5%
Pulmonary disease	6.6%
Cancer	6.2%

Behavior / access	%
Binge drinking	13.9%
No physical activity	35.9%
Less than 7 hrs sleep	33.3%
Fair or poor health	27.4%
Poor mental health	13.1%
Poor physical health	15.0%
No health insurance	40.3%
Visited doctor (checkup)	74.9%
Visited dentist	49.6%
Cholesterol screening	92.0%
Teeth loss	14.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	25.0%
Under 18	23.3%
18–64 years	32.1%
65 and over	15.8%

Health insurance coverage

Type	%
Private insurance	62.1%
Public insurance	47.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	123	99.2%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	124	100.0%
Born in same state	124	100.0%
Born in different state	124	100.0%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Technology access

Metric	% of households
Computer access	35.5%
Internet access	72.7%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What is the ZIP code for San Isidro, TX?

San Isidro, TX has one ZIP code: 78588.

What is the main ZIP code for San Isidro, TX?

The primary ZIP code for San Isidro, TX is 78588. The city uses area code 956 for phone service.

What county is San Isidro, TX in?

San Isidro is located in Starr County, Texas.

How many ZIP codes are in San Isidro, TX?

San Isidro, TX has 1 ZIP code.

What is the ZIP code for the main residential area of San Isidro in Starr County?

The primary ZIP code for San Isidro, Texas is 78588, which covers the entire city and its residential neighborhoods.

If I'm mailing a package to a business in San Isidro, Starr County, what ZIP code should I use?

You should use ZIP code 78588 for all mail and packages being sent to addresses in San Isidro, Texas.