Rancho Chico is a census-designated place (CDP) in San Patricio County, Texas, United States.

[3] According to the United States Census Bureau, the CDP has a total area of 0.5 square mile (1.3 km2), all land.

24.0% of all households were made up of individuals, and 7.0% had someone living alone who was 65 years of age or older.

About 33.8% of families and 36.4% of the population were below the poverty line, including 63.0% of those under the age of eighteen and 18.6% of those 65 or over.

Rancho Chico is served by the Sinton Independent School District.