Admission criteria are established by both the Graduate College and by the graduate program.

Iowa State requires a bachelor's or higher degree from a regionally-accredited college or university prior to beginning graduate studies. Because holding a degree from a regionally accredited institution is a fundamental requirement for graduate study at Iowa State University, no appeals to waive this requirement are considered.
International degrees must be comparable to a US bachelor's degree or higher from a college or university regionally accredited/recognized by the Ministry of Education in that country.
3-year degrees from India, Bangladesh, Canada (excluding Quebec), Nepal, and Pakistan are not accepted. 3-year degrees from other countries are reviewed on an individual basis.
A minimum cumulative grade point average equivalent to at least a 3.0 on a 4.0 scale (B grade) is required for admission.
The English proficiency requirements of the Graduate College and the graduate program to which you have applied must both be met prior to enrollment.
There is no university-wide requirement that graduate applicants submit results from the Graduate Records Examination (GRE) or the Graduate Management Admissions Test (GMAT), however, most programs do require one or the other.TOEFL Paper (PBT) 550
TOEFL Internet (iBT) 80
IELTS 6.5