Schreiner University is a private Presbyterian university in Kerrville, Texas. The university enrolls an estimated 1,300 undergraduate and graduate students. It offers over 40 four-year undergraduate programs, an MBA and a master of education. Established in 1923, it has been coeducational since 1932. The university is also home to Schreiner Institute, a college-level service academy preparatory program for those who did not receive appointments or nominations straight out of high school, ROTC, and veteran services. Prior to the founding of the Schreiner Institute, Schreiner University was home to Greystone Preparatory School, a service academy preparatory program, which now operates at the University of the Ozarks.

Captain Charles Schreiner Sr. founded "Schreiner Institute" (sometimes called Schreiner Military Institute) in 1917 and worked toward its establishment until 1923. The military institute, a residential school, was created for young boys and included both secondary school and junior college curricula to prepare students for further education. 1971 marked the end of military training at the institute. In 1973, it began focusing on a college curriculum and changed its name to "Schreiner College". The college experience changed once more in 1981 when it became a four-year college. The college became "Schreiner University" in 2001 and began offering master's degrees. Schreiner University now hosts a number of lecture series and academic conferences, including its annual popular culture symposium.

In 2017, Schreiner surpassed its five-year capital campaign fundraising goal of $50 million. Since 2012, the institution has received $52.4 million from approximately 3,600 donors. Nearly $30 million of the amount raised is earmarked for student scholarships, which have been previously funded at $13 million. The school will add endowed chairs in mathematics, science, and humanities and hire a visiting artist and performer or designer in residence. Schreiner has a current enrollment of 1,326.

The university no longer operates the Hill Country Museum in the house of its founder, the Capt. Charles Schreiner Mansion.

Schreiner University is accredited by the Commission on Colleges of the Southern Association of Colleges and Schools to award masters, baccalaureate and associate degrees. The university also holds accreditation by the Texas Board of Vocational Nurse Examiners and is approved by the Texas Board of Nursing as well as the State Board for Educator Certification (SBEC) for teacher certification programs.

The university holds membership in the American Association for Higher Education, the American Council on Education, the Association of Presbyterian Colleges and Universities, the National Association of Independent Colleges and Universities, the Association of Texas Colleges and Universities, and the Independent Colleges and Universities of Texas.

Schreiner University sports teams participate as a member of the National Collegiate Athletic Association (NCAA)'s Division III. The Mountaineers are a member of the Southern Collegiate Athletic Conference (SCAC), but will move to the American Southwest Conference (ASC) effective July 1, 2026.

Men's sports include baseball, basketball, track and field, cross country, golf, soccer and tennis; while women's sports include basketball, track and field, cross country, golf, soccer, softball, tennis and volleyball. Wrestling was added for the start of the 2018-19 year, only the second program in the state after Wayland Baptist University and the first in the NCAA.