The Alumni Factor, a book and website that ranks colleges and universities, has surveyed thousands of alumni from 177 institutions and ranked the schools based on the political views of their alumni. The institutions whose alumni are the most conservative:

Colleges with the most conservative alumni
1 U.S. Air Force Academy Colorado Springs, CO
2 Brigham Young University Provo, UT
3 Auburn University Auburn, AL
4 U.S. Naval Academy Annapolis, MD
5 U.S. Military Academy West Point, NY
6 Texas A & M University College Station, TX
7 University of Mississippi Oxford, MS
8 Georgia Insitute of Technology Atlanta, GA
9 Baylor University Waco, Texas
10 University of Alabama Tuscaloosa, AL
Source: The Alumni Factor