Division I champions are those wrestlers who have won first place in their weight divisions at the NCAA Championship Tournament. Those with an asterisk beside their names are NCAA Outstanding Tournament Wrestlers.
| Year | Wrestler | Weight |
|---|---|---|
| 1937 | Ray Cheney | 135 |
| 1946 | Cecil Mott | 121 |
| 1946 | *Gerald Leeman | 128 |
| 1946 | Bill Koll | 145 |
| 1947 | *Bill Koll | 145 |
| 1947 | Russ Bush | 128 |
| 1947 | Bill Nelson | 165 |
| 1948 | *Bill Koll | 147.5 |
| 1949 | Bill Nelson | 155 |
| 1949 | Bill Smith | 165 |
| 1949 | Keith Young | 145 |
| 1950 | Bill Nelson | 155 |
| 1950 | Bill Smith | 165 |
| 1950 | Keith Young | 145 |
| 1951 | Keith Young | 147 |
| 1952 | Gene Lybbert | 130 |
| 1952 | Bill Weick | 157 |
| 1953 | Jim Harmon | 157 |
| 1955 | Bill Weick | 157 |
| 1963 | Bill Dotson | 137 |
Table taken from the 1996-97 Northern Iowa Wrestling press book; page designed by Library Assistant Susan A. Basye with thanks to Student Assistant Jonathan Russell, May 1997; last updated, January 22, 2014 (GP).