Hill's key free throws gave him 19 points to go with seven rebounds. Tyler Brown provided 27 points for the Redbirds (15-10, 6-7 MVC).
Jackie Carmichael also reached double figures with 16 points and collected six rebounds in Illinois State's third straight victory.
The Bluejays (20-5, 9-4), meanwhile, lost for the second consecutive time despite 24 points and 13 boards from Doug McDermott.
Creighton couldn't find the range from outside, hitting just four of its 23 attempts from 3-point range.