The University of Illinois Springfield (UIS) is a public university in Springfield, Illinois. The university was established in 1969 as Sangamon State University by the Illinois General Assembly and became a part of the University of Illinois system on July 1, 1995. As a public liberal arts college, and the newest campus in the University of Illinois system, UIS is a member of the Council of Public Liberal Arts Colleges. UIS is also part of the American Association of State Colleges and Universities and the American Council on Education. The campus' main repository, Brookens Library, holds a collection of nearly 800,000 books and serials in addition to accessible resources at the University of Illinois Chicago and University of Illinois Urbana-Champaign campuses.

The University of Illinois Springfield serves 4,146 students (Fall 2020) in 30 undergraduate degree programs, 20 master's degree programs, and a doctorate in Public Administration. The university was once one of the two upper-division and graduate universities in Illinois, but now accepts freshmen, transfer, and graduate students.