[9] As enrollment increased, Sonoma State built more on-campus facilities, including Ives Hall for performing arts, The University Commons for dining, a small library, and a gymnasium.

The new cluster school concept, coupled with a more intense focus on the surrounding rural environment, influenced the new physical master plan.

The new Student Health Center used a primarily redwood façade with a landscaped ground cover of wild roses and poppies.

In May 2001, the board of trustees approved a new master plan, which added 48 acres (19 ha) to the campus, located north of Copeland Creek.

In the same year, the Jean and Charles Schulz Information Center was completed to accommodate the expanded needs of the library and computing services.

A large portion of the funding to build the information center was donated by Charles Schulz, cartoonist and author of the popular Peanuts comic series, and his wife Jean.

The renovated structure was completed and re-opened in fall 2006 and provided new laboratories and classrooms to support the needs of a modern science curriculum.

[12] The new property approved by the board of trustees in 2000 is also the site of the Donald and Maureen Green Music Center, funded by private donors.

The operation focused on an alleged misuse of federal grant money by the California Institute for Human Services (CIHS),[17] a unit closed by SSU in 2007.

To address the deficit, they announced plans to eliminate numerous positions on campus and let go employees, including 46 tenured and adjunct faculty members.

[21] Sonoma State occupies approximately 269 acres (109 ha) on the east side of the main suburban area of Rohnert Park.

Directly adjacent to the main campus is Wolf's Den Plaza, a frequent hangout and eating area for SSU students.

The library houses a collection of writings and original letters from Jack London, as well as memorabilia relating to his works.

[29] In addition to the main campus, the university also owns and operates two off–campus study sites for students of the natural sciences.

A $12 million donation from Joan and Sandy Weill, announced in March 2011, provided the funds to complete the concert hall for the fall 2012 opening.

[34] Popular majors for undergraduates in 2018 included Business Administration (Management and Operations) at 18.43%, Psychology (General) at 9.02%, and Sociology at 7.05%.

Popular majors for graduates were Business Administration (Management and Operations) at 24.70%, Education (General) at 16.33% and Student Counseling and Personnel Services at 11.95%.

The Hutchins School of Liberal Studies is an interdisciplinary learning community within the larger institution of Sonoma State University.

[47] Sonoma State University is the only California school that belongs to the Council of Public Liberal Arts Colleges.

Ten of SSU's sports are in the CCAA, water polo is in the WWPA, and men's and women's tennis are in the PacWest.

[50] Besides both being located in the west of California, but one in the south and the other in the north, Sonoma and Dominguez Hills have competed heavily as conference rivals in soccer.

[54] Sonoma State University has over one hundred chartered student organizations, including fraternities and sororities, and over twenty sports clubs.