ZIP Code 78588
About San Isidro
San Isidro is a census-designated place (CDP) in Starr County, Texas, United States. As of the 2020 census, San Isidro had a population of 187. The town is named for St. Isidore the Laborer, the patron saint of farmers. A large Southwestern Barrel Cactus growing just east of town is said to be the largest in Texas.
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Area Profile
US Census (ACS 5-year · Gazetteer)
246
population
$86,458
median household income
7
people / sq mi
$530
median gross rent
41.5
median age
125
housing units
63
households
36.6
land area (sq mi)