Here's a link to the list:
LINK: NFL Players who attended Iowa State University
The following is a link to the general database of schools. Among the in-state schools include Coe College, Cornell College, Des Moines University, Drake, Ellsworth, Grinnell College, Indian Hills, Iowa Central, Iowa Weslyan, Kirkwood, Loras, Luther, Marshalltown, Morningside, Simpson, UNI, and some Big 11 school in Eastern Iowa...
LINK: Colleges of NFL Players