Southern Illinois University System is a public university system in Illinois that has 2 schools/campuses. By school type (Carnegie classification), there are 1 Research University (very high research activity) and 1 Doctoral / Research University in its system. All 2 schools offer both undergraduate and graduate programs.
The 2025 average tuition of the colleges is $12,713 for state residents and $12,713 for out-of-state students. The average graduate program tuition & fees is $12,354 for state residents and $12,713 for out-of-state students.
79% of the enrolled undergraduates have received grants or scholarships, with an average aid amount of $11,655. Southern Illinois University System has a total enrollment of 23,683 and the students to faculty ratio is 13 to 1 (7.69%).
Colleges in Southern Illinois University System
Southern Illinois University System Core Statistics
| System Name | Southern Illinois University System |
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| Number of Schools | 2 |
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| Undergraduate Program Offered | 2 |
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| Graduate Program Offered | 2 |
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| Tuition & Fees | $12,713 in-state, $12,713 out-of-state |
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| Graduate Tuition & Fees | $12,354 in-state, $20,805 out-of-state |
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| Financial Aid | $11,655 |
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| Acceptance Rate | 92.19% |
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| Yield (Enrollment Rate) | 17.15% |
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| SAT Score | 1,055 |
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| Students to Faculty Ratio | 13 to 1 |
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| Graduation Rate | 59.50% |
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| Total Enroll | 23,683 students |
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| Undergraduate | 17,498 students |
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| Graduate | 6,185 students |
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