Outcome figures are institution wide, from the US Department of Education College Scorecard.
GRENot required
Optional, considered if submitted
English test (TOEFL or IELTS)See policy
International students may have to take and pass an English proficiency exam in accordance with the Graduate School's requirements.
Minimum GPASee policy
3.0
Recommendation lettersRequired
2 letters
Prior degreeSee policy
undergraduate degree in one of the biological, chemical or physical sciences
Statement of purposeRequired
“A non-refundable $65 application fee”
“At least 2 letters of recommendation.”
“While not required, applicants are strongly encouraged to submit Graduate Record Examination (GRE) general test scores.”
Extracted from gradcatalog.siu.edu (opens in new tab) and siu.edu (opens in new tab) · latest recorded check 2026-09-08
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