| NAME | Year at National | Placed at National | Iowa State Champ | Iowa county were contestants were from. |
| Clarence Bockes | 1929, 1933 | (6th, 1929) (11th, 1933) | 1933 | Grundy |
| Lee Carey | 1931 | 3rd | 1931 | Marshall |
| Carl Carlson | 1936 | 1st | 1936 | Audubon |
| Elmer Carlson | 1935 | 1st | 1935 | Audubon |
| Ivyl Carlson | 1940, 1941 | (3rd, 1941) (3rd, 1940) | 1941 | 1940 Boone, 1941 Polk |
| George Dickenson | 1927 | 5th | 2nd place | Hardin |
| Ben Grimmius | 1924, 1928 | (4th, 1924) (9th, 1928) | 1924 | Grundy |
| Ruel Harman | 1928 | 5th | 1928 | Mills |
| Elke Hendricks | 1931, 1935, 1936 | (6th, 1931) (5th, 1935) (17th, 1936) | 2nd place | Grundy |
| Walter Johansen | 1932-1934 | (3rd, 1932) (6th, 1933) (8th, 1934) | 2nd place | Audubon |
| Marion Link | 1940 | 2nd | 2nd place | Story |
| John Middlekoop | 1937 | 8th | 2nd place | Mahaska |
| Henery Peterson | 1938 | 12th | 1938 | Webster |
| Mearl Pottroff | 1926 | 5th | 2nd place | Carroll |
| Leo Rettler | 1925 | 6th | 1925 | Keokuk |
| Alvin Roberts | 1939 | 15th | 1939 | Muscatine |
| Fred Stanek | 1924-1927, 1930 | (5th, 1924) (1st, 1926) (1st, 1927) (1st, 1930) | 1926, 1927 | Webster |
| George Steffens | 1939 | 7th | 2nd place | Cass |
| Lee Stodgell | 1934, 1937 | (5th, 1943) (11th, 1937) | 1934, 1937 | Louisa |
| Clyde Tague | 1929, 1930 | (3rd, 1929) (8th, 1930) | 1929, 1930 | Gutrie |
| Orville Wicks | 1932 | 11th | 1932 | Wright |
| Harold Larson | 1938 | 3rd | 2nd place | Wright |
| Cameron Krauel | 1941 | 5th | 2nd place | Audubon |