Census-designated place · Texas
San Isidro, Texas
San Isidro, census-designated place, in Starr County, Texas. San Isidro had 187 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 214 (±110). GEOID 4865432.
Residents, 2020 Census
187
Census count or controlled total
ACS 2020-2024 estimate: 214 ±110
Median household income
not published
Texas: $78,476
Median home value
$47,100
±$18,742 (90% margin)
Texas: $283,800
Median gross rent
not published
Texas: $1,403
Where is San Isidro and what county is it in?
San Isidro is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Starr County, Texas. It covers 3.1 square miles of land, 60 residents per square mile in 2020.
San Isidro is in the Rio Grande City-Roma, TX micropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in San Isidro, and is it growing?
The 2020 Census counted 187 residents in San Isidro, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 214 (±110).
The Census Bureau publishes yearly population estimates for incorporated places only; San Isidro is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | San Isidro | Starr County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 214 ±110 | 66,067 | no clear change |
| Households | 86 ±44 | 19,157 | no clear change |
| Average household size | 2.49 ±0.76 | 3.42 | no clear change |
| Housing units | 116 ±47 | 23,139 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in San Isidro?
The median resident of San Isidro is 51.7 years old. The largest group is Hispanic or Latino residents (of any race) at 97.7%, then non-Hispanic white residents at 2.3%.
| Measure | San Isidro | Starr County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 51.7 ±7.7 | 29.4 | +11.2 |
| Under 18 years | 15.4% ±8.7 pts | 32.5% | – |
| 65 years and over | 22.9% ±15.7 pts | 11.4% | – |
| Male | 42.1% ±12.5 pts | 48.8% | – |
| Hispanic or Latino (any race) | 97.7% ±3.5 pts | 97.2% | no clear change |
| White alone, not Hispanic | 2.3% ±3.5 pts | 2.3% | – |
| Black or African American alone, not Hispanic | 0.0% ±20.7 pts | 0.4% | – |
| Asian alone, not Hispanic | 0.0% ±20.7 pts | 0.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±20.7 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±20.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 0.0% ±20.7 pts | 0.1% | – |
| Some other race alone, not Hispanic | 0.0% ±20.7 pts | 0.0% | – |
| Born outside the United States | 20.6% ±14.1 pts | 27.2% | – |
| Speak a language other than English at home (age 5+) | 67.0% ±19.1 pts | 91.2% | – |
| Civilian veterans (age 18+) | 1.7% ±2.4 pts | 2.0% | – |
| With a disability | 25.7% ±18.7 pts | 16.8% | – |
| No health insurance coverage | 15.0% ±18.3 pts | 28.9% | – |
| High school graduate or higher (age 25+) | 79.5% ±14.6 pts | 60.4% | – |
| Bachelor's degree or higher (age 25+) | 26.3% ±20.5 pts | 13.6% | – |
| Graduate or professional degree (age 25+) | 17.9% ±16.2 pts | 4.7% | – |
| Lived in the same house a year earlier | 100.0% ±20.7 pts | 92.1% | – |
| Moved from another state in the past year | 0.0% ±20.7 pts | 0.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in San Isidro earn?
The Census Bureau does not publish a median household income for San Isidro: too few households were sampled.
| Measure | San Isidro | Starr County | Change since 2015-2019 |
|---|---|---|---|
| Mean household income | $50,194 ±$19,397 | $58,715 | – |
| Per capita income | $21,267 ±$6,862 | $18,829 | no clear change |
| People below the poverty line | 15.0% ±18.3 pts | 33.5% | – |
| Children under 18 below the poverty line | 0.0% ±64.0 pts | 40.9% | – |
| Households receiving SNAP | 11.6% ±18.2 pts | 42.5% | – |
| Households with a computer | 86.0% ±20.3 pts | 88.5% | – |
| Households with a broadband subscription | 60.5% ±29.3 pts | 78.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in San Isidro?
Owners occupy 80.2% of San Isidro's occupied homes and renters 19.8%. The median owner-occupied home is valued at $47,100 by its owner (±$18,742).
| Measure | San Isidro | Starr County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $47,100 ±$18,742 | $95,100 | – |
| Renters paying 35% or more of income on rent | 0.0% ±89.2 pts | 46.8% | – |
| Owner-occupied homes | 80.2% ±19.9 pts | 69.5% | no clear change |
| Renter-occupied homes | 19.8% ±19.9 pts | 30.5% | – |
| Housing units | 116 ±47 | 23,139 | no clear change |
| Homeowner vacancy rate | 0.0% ±44.3 pts | 1.1% | – |
| Rental vacancy rate | 0.0% ±89.2 pts | 6.5% | – |
| Single-family detached homes | 86.2% ±13.4 pts | 79.5% | – |
| Mobile homes | 5.2% ±8.4 pts | 9.9% | – |
| Built 2020 or later | 0.0% ±33.4 pts | 1.6% | – |
| Built 2010 to 2019 | 7.8% ±9.0 pts | 16.5% | – |
| Built 1939 or earlier | 0.0% ±33.4 pts | 1.1% | – |
| Households with no vehicle | 4.7% ±8.3 pts | 10.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in San Isidro work and get to work?
61.7% of San Isidro's workers drive alone. The average trip to work takes 17.7 minutes.
| Measure | San Isidro | Starr County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 47.5% ±21.4 pts | 56.8% | – |
| Unemployment rate | 5.8% ±9.4 pts | 10.4% | – |
| Drove alone to work | 61.7% ±31.2 pts | 71.9% | – |
| Carpooled | 18.5% ±22.2 pts | 12.8% | – |
| Public transportation | 0.0% ±40.9 pts | 0.0% | – |
| Walked | 12.3% ±20.1 pts | 3.7% | – |
| Worked from home | 7.4% ±11.0 pts | 9.3% | – |
| Mean travel time to work | 17.7 min ±10.8 | 22.6 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in San Isidro?
No census tract lies mostly in San Isidro; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9501.01Starr County | 934 | $37,738 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in San Isidro) · Census block assignment files
How does San Isidro compare with other places in Texas?
San Isidro is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
San Isidro's figures with every place in Texas (CSV)
Every place in Texas, sortable · Compare San Isidro with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for San Isidro?
33 of the 54 figures for San Isidro on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for San Isidro are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.