San Marcos is located in Texas. San Marcos, Texas 78666 has population of 57,775. San Marcos 78666 is less family-centric than the surrounding county with 19% of the households with children.
The median household income in San Marcos, Texas 78666 is $45,590. The median household income for the surrounding county is $75,051 compared to the national median of $66,222. The median age of people living in San Marcos 78666 is 25.2 years.
The average high temperature in July is 95.1 degrees, with an average low temperature in January of 38.6 degrees. The annual precipitation is 37.19.
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