The main campus is situated on . It is centered on the campus mall, a tree-lined pedestrian walkway that covers over 1 mile (1.6 km) and connects most major buildings. It has changed significantly since 1965 as a result of the development of an ultramodern physical plant now valued at over $450 million. The university consists of over 60 buildings encompassing of available space. Major academic buildings include the Porter Henderson Library, which was completed in the fall of 1967, and the Raymond M. Cavness Science Building, which was opened in the spring of 1968. An academic building and a 10-story women's high-rise residence hall and accompanying food-service center were opened in September 1968. A second 10-story residence hall for men opened in September 1969. The modernization and expansion of the Houston Harte University Center was completed during the summer of 1971, and a physical education complex was opened in the summer of 1972. The Mayer Museum, a variety
museum that consists of natural science, art, history, and a permanent arrowhead collection, finished construction in 2021. The Robert and Nona Carr Education-Fine Arts Building, completed during the spring of 1976, provides ultramodern facilities for the Departments of Education, Art and Music, and Communications, Drama, and Journalism. In addition to an extensive array of teaching facilities, many special-use areas are incorporated in the building, including the theater, recital hall, and band hall, and an area for art design and ceramics. The 60,000-sq-ft (5,600 m) Emil C. Rassman Building, completed during the summer of 1983, houses the Department of Business Administration, the Department of Accounting, Economics, and Finance, and Department of Aerospace Studies, as well as the office of the Dean of the College of Professional Studies. The Lloyd D. and Johnell S. Vincent Nursing-Physical Science Building was completed during the spring semester of 1985. Located across the mall from the Physical Education Building and the Emil C. Rassman Building, the building contains about 73,000 sq ft (6,800 m) arranged over two floors. The building houses the Physics and Geosciences Department, David L. Hirschfeld Department of Engineering, the Department of Security Studies and Criminal Justice, and offices for the Dean of the College of Sciences and Engineering. Specialized teaching and laboratory facilities are included for physics, physical science, geology, and engineering. The building houses one of the largest
planetariums among the nation's colleges and universities, featuring a 50-ft (15 m) dome and seating for 114. The facility is used as a lecture hall and for other special programs. It is also used in conjunction with academic courses in astronomy and for public shows. The 86,000-sq-ft (8,000 m) Mathematics-Computer Science Building, completed in 1996, houses the Department of Mathematics and the Department of Computer Science, as well as facilities to support the university's mainframe computing services. Other recent additions include expansion of the Cavness Science Building, construction of the new Texan Hall residences, and adding another floor to the Porter Henderson Library to accommodate the Communications, Drama, and Journalism Department and Honors Program. The
Management Instruction and Research Center is a ranch on
O.C. Fisher Lake property, which Angelo State has under long-term lease from the
US Corps of Engineers. These facilities support the programs in animal science and biology and a wide range of management and research activities.
Safety and security Sixteen emergency call boxes are strategically spread across campus. In the case of an emergency and the need for immediate assistance, all calls are routed directly to the Angelo State Police Department. In addition Angelo State has a "Lifeline App" for IPhone or Android made available free of charge. It can be used for distress calls or with use of a hands-free timer that will send for help if not deactivated. GPS location can be used to instantly send ASU Police to that location. The Angelo State University Police Department employs 14 full-time police officers, all certified state peace officers, with the same qualifications and powers that municipal police departments deploy. They patrol the campus 24 hours/day, 365 days/year. The ASU alert system sends out messages to all campus emails and cell phones registered through the system in the case of any campus or regional emergency. ==Student life==