Meadows Center for Water and the Environment

San Marcos Springs is the second largest natural cluster of springs in Texas. The springs are located in the city of San Marcos, Texas, about 30 miles (48 km) southwest of Austin and 46 miles (74 km) northeast of San Antonio. Although Spring Lake is highly protected, it is accessible to visitors through the Meadows Center for Water and the Environment, a program of Texas State University, which offers glass-bottom boat tours among other opportunities to explore and learn about the ecosystem.

Strahan Arena is a 10,000-seat multi-purpose arena in San Marcos, Texas. It is an $8.8 million facility built in 1982 and is home to the Texas State University Bobcats men's basketball team, women's basketball team and women's volleyball team. The arena was previously known as Strahan Coliseum, but changed its name to the University Events Center as part of a late 2018 expansion.On September 15, 2008, the Houston Comets and the Sacramento Monarchs of the WNBA came to play in the Coliseum due to Hurricane Ike canceling the final home game of the regular season for the Houston Comets. The Comets defeated Sacramento 90–81. This would end up being the last game the Comets ever played; they folded after the season ended. On March 21-22, 2021, the arena hosted six First Round games of the 2021 NCAA Division I women's basketball tournament as part of the relocation of the entire event to San Antonio and surrounding areas due to COVID-19 precautions.

Bobcat Ballpark is a baseball venue in San Marcos, Texas, on the campus of Texas State University. It is home of the Texas State Bobcats baseball team of the NCAA Division I Sun Belt Conference. It currently holds 2,400 spectators. In 2008, the baseball and softball stadiums were renovated and expanded to its current design. In addition, four luxury suites for up to 12 people were added. The renovations made their debut on March 5, 2009 against the Texas Longhorns with a record setting 2,593 people.Features of the venue include a press box, team merchandise area, batting cages, stadium lighting, and a chain link/mesh backstop.In 2013, the Bobcats ranked 47th among Division I baseball programs in attendance, averaging 1,368 per home game.In addition to Bobcat baseball, the stadium hosts other baseball events, such as high school baseball tournaments. From May 23–26, 2012, it hosted the 2012 Southland Conference baseball tournament, won by UT Arlington.

Bobcat Stadium is a football stadium on the campus of Texas State University in San Marcos, Texas. It opened in 1981 and was expanded in 2011–2012 to its present 30,000-seat capacity. Bobcat Stadium has been the home field for the Texas State Bobcats since 1981. In November 2003, the field was renamed Jim Wacker Field in honor of the former Bobcats football coach and director of athletics.

Old Main is a red-roofed Victorian Gothic building on the campus of Texas State University. Situated at one end of the quad, it was Texas State's first building, built in 1903, and remained the only building on campus until 1908. Old Main was added to the National Register of Historic Places (NRHP) in 1983. It currently houses the offices for the School of Journalism and Mass Communication as well as the College of Fine Arts.

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 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.

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.

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 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 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.

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.