San Juan is a medium-sized city located in the state of Texas. With a population of 35,782 people and nine associated neighborhoods, San Juan is the 95th largest community in Texas. Much of the housing stock in San Juan was built relatively recently. The construction of new real estate can often be taken as an indication that the local San Juan economy is robust, and that jobs or other amenities are attracting an influx of new residents. This seems to be the case in San Juan, where the median household income is $51,497.00.

San Juan is a decent-sized city, yet no one gets to work using public transit, because the city has no real transit system.

The percentage of adults in San Juan with college degrees is slightly lower than the national average of 21.84% for all communities. 14.30% of adults in San Juan have a bachelor's degree or advanced degree.

The per capita income in San Juan in 2018 was $17,673, which is low income relative to Texas and the nation. This equates to an annual income of $70,692 for a family of four. However, San Juan contains both very wealthy and poor people as well.

San Juan is an extremely ethnically-diverse city. The people who call San Juan home describe themselves as belonging to a variety of racial and ethnic groups. People of Hispanic or Latino origin are the most prevalent group in San Juan, accounting for 96.64% of the city’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of San Juan residents report their race to be White, followed by Asian. Important ancestries of people in San Juan include German, English, Swedish, Brazilian, and Scots-Irish.

Foreign born people are also an important part of San Juan's cultural character, accounting for 25.88% of the city’s population.

The most common language spoken in San Juan is Spanish. Other important languages spoken here include English and African languages.