San Marcos Baptist Academy

The Freeman Center is a 3,485-acre (1,410 ha) plot of land between San Marcos and Wimberley, Texas. It was founded in 1941 by weekend ranchers Harold M. "Harry" Freeman and his brother Joe. The Freeman Center houses the Texas State University Forensic Anthropology Center's body farm, where the deceased are used to study the various stages of body decomposition and their effects on the soil.

Wonder World is a natural theme park located in San Marcos, Texas. The park's primary attraction is Wonder Cave, an ancient earthquake cave and Recorded Texas Historic Landmark. Other attractions include an anti-gravity house, a trackless motor train, and a wildlife park.

Dick's Classic Garage was an automobile museum in San Marcos, Texas. It was founded in 2009 by Dick Burdick, a Texas businessman and car collector, who also operated the now defunct Central Texas Museum of Automotive History in Rosanky, Texas. Dick's Classic Garage was inaugurated in 2009. It closed to the public on December 31, 2018. The museum showcases American vehicles and memorabilia from the 1930s though the 1950s and displays a 1948 Tucker Sedan (chassis number 1050; this is the lowest mileage Tucker with 0.4 miles on the odometer). The museum also includes a restoration area.

Fort Street Presbyterian Church is a historic Presbyterian church building at 516 W. Hopkins Street in San Marcos, Texas. The late-Gothic Revival building was constructed in 1901 and added to the National Register of Historic Places in 1984.

The Wittliff Collections, located on the seventh floor of the Albert B. Alkek Library at Texas State University, was founded by William D. Wittliff in 1987. The Wittliff Collections include the Southwestern Writers Collection and the Southwestern & Mexican Photography Collection.

The McCoy College of Business Administration is the business school of Texas State University. The college offers curriculum for both undergraduate and graduate students and receives its business accreditation from the Association to Advance Collegiate Schools of Business. Established in 1968, Texas State's business school was originally known as the College of Business Administration. Following a $20 million gift from local businessman and wife Emmett and Miriam McCoy in 2004, the school was formally renamed the Emmett and Miriam McCoy College of Business Administration. The endowment, now administered by the McCoy College of Business Development Foundation, provides distinguished professorships, scholarships to both undergraduates and graduates, and program development. Later, the McCoys were awarded honorary doctorates, being the seventh and eighth individuals receiving such awards from Texas State University. The College contains five departments: Accounting; Computer information systems and QMST; Marketing; Management; Finance and Economics.

The Albert B. Alkek Library is the main central library of Texas State University. The Wittliff collections of Southwestern Writers and Southwestern & Mexican Photography is located on the seventh floor of the Alkek Library The university's library was named, in 1991, for an alumnus who became an oilman, rancher, and philanthropist, Albert B. Alkek. The Albert B. Alkek Library serves as the main, central academic library supporting the Texas State University (then called Southwest Texas State University) community. As a storehouse for United States and Texas government documents, the library receives a large number of government publications from the state and 60% of all federal publications. The mission of the library, as stated by University Officials, "is to advance the teaching and research mission of the University and support students, faculty, staff and the greater community by providing patron‐centered services, comprehensive and diverse collections, individual and collaborative learning environments, innovative technologies, and opportunities to learn, create and discover."Among the Library's seven floors, students encounter over 1.5 million printed texts, over 2 million microfilm & audio-visual materials, 546,700 electronic books, 471 databases, 110,800+ electronic journals, University Archives, and curriculum materials approved by the Texas Education Agency for primary and secondary schools. In addition to the vast amount of resources, the Library encompasses niche collections which are rare to the University. These holdings include The Wittliff Collections housed on the Library's seventh floor, the King of the Hill archives, major work of significant writers such as Cormac McCarthy, Sandra Cisneros and Sam Shepard, and the Lonesome Dove collection.

First United Methodist Church is a historic church at 129 W. Hutchison in San Marcos, Texas. An easily recognized landmark of the San Marcos skyline is the Carpenter Gothic sanctuary of First United Methodist Church. The sanctuary was built in 1893, but the congregation dates back to 1847 in the earliest days of the city of San Marcos. The present sanctuary is the third building to occupy this site. First United Methodist Church's historic 1893 sanctuary served as the architectural inspiration for the Old Main building at Texas State University.

The Fire Station and City Hall at 224 N. Guadalupe St. in San Marcos, Texas was built in 1915. It was listed on the National Register of Historic Places in 1983.It is a two-story buff brick building. It was designed by Austin architect Roy L. Thomas.

The Forensic Anthropology Center at Texas State (FACTS) is a 26-acre forensic anthropology research facility located on the Freeman Ranch in San Marcos, Texas. It is one of the seven extant body farms in the United States and the largest such forensics research facility in the world.

Texas State University is a public research university in San Marcos, Texas. Since its establishment in 1899, the university has grown to the second largest university in the Greater Austin metropolitan area and the fifth largest university in the state of Texas. Texas State University reached a record enrollment of 38,808 students in the 2016 fall semester, continuing a trend of enrollment growth over several years. The university offers more than 200 degree options from its ten colleges. Texas State is classified among "R2: Doctoral Universities – High research activity" and an emerging research university by the State of Texas. The university is accredited by the Southern Association of Colleges and Schools (SACS). Faculty from the various colleges have consistently been granted Fulbright Scholarships resulting in Texas State's being recognized as one of the top producing universities of Fulbright Scholars. The 36th president of the United States, Lyndon B. Johnson, graduated from the institution in 1930; Texas State University is the only college or university in Texas to have a U.S. president as an alumnus. Texas State's main campus consists of 245 buildings on 492 acres (1.99 km2) of hilly land along the San Marcos River. Additionally, it has a satellite campus at the Texas State University Round Rock Campus (RRC) in the greater north Austin area. The university operates the Science, Technology and Advanced Research (STAR) Park, a technology commercialization and applied research facility. The Forensic Anthropology Center at Texas State is the largest forensics research facility in the world.Texas State University's intercollegiate sports teams, commonly known as the Bobcats, compete in National Collegiate Athletic Association (NCAA) Division I and the Sun Belt Conference.

The Hays County Courthouse is an historic courthouse located in San Marcos, Hays County, Texas. It was built in the Classical Revival style in 1908. It is recognized by both the National Register of Historic Places and Texas Historical Commission.