Texas State University (TXST) is a public research university with its main campus in San Marcos, Texas and another campus in Round Rock. Since its establishment in 1899, the university has grown to be one of the largest universities in the United States. Texas State University reached a record enrollment of 38,873 students in the 2023 fall semester, continuing a trend of enrollment growth over several years.

San Marcos is a city and the county seat of Hays County, Texas, United States. The city is a part of the Greater Austin Metropolitan Area. San Marcos's limits extend into Caldwell and Guadalupe counties, as well. San Marcos is on the Interstate 35 corridor between Austin and San Antonio. Its population was 44,894 at the 2010 census and 67,553 at the 2020 census. Founded on the banks of the San Marcos River, the area is thought to be among the oldest continuously inhabited sites in the Americas. San Marcos is home to Texas State University and the Meadows Center for Water and the Environment.