| 1856 | Clayton | Grand Meadow | Barney, Clark |
| 1856 | Mahaska | Harrison | Brubaker, May |
| 1860 | Clayton | Giard | Bernhard |
| 1860 | Mahaska | Harrison | Brubaker, May |
| 1860 | Page | Valley | Beaver, Castator |
| 1870 | Allamakee | Post | Clark, Emberson |
| 1870 | Clayton | Monona | Bernhard |
| 1870 | Fremont | Sidney | Johnson, Yowell |
| 1870 | Mahaska | Harrison | Brubaker, May |
| 1870 | Page | Valley | Beaver, Castator |
| 1880 | Fremont | Sidney | Johnson, Yowell |
| 1880 | Jasper | Elk Creek | Clark |
| 1880 | Jefferson | Liberty | Fickett, Goodnough |
| 1880 | Mahaska | Harrison | Brubaker, May |
| 1880 | Mahaska | Oskaloosa | May |
| 1880 | Story | Milford | Lennin, Yelton |
| 1885 | Jasper | Elk Creek | Clark |
| 1885 | Mahaska | Harrison | Brubaker, May |
| 1895 | Cerro Gordo | Mason City | Clark, Simmons, Wineman |
| 1900 | Cerro Gordo | Mason City | Clark, Simmons, Wineman |
| 1900 | Dubuque | Julien | Simmons, Wineman |
| 1900 | Hancock | Boone | Higdon, Miller, Salstrom, Van Schoyck |
| 1900 | Lee | Des Moines | Higdon |
| 1900 | Linn | Cedar Rapids | Meinzer, Rapps |
| 1900 | Mahaska | Harrison | Brubaker |
| 1900 | Mahaska | West Des Moines | May |
| 1900 | Van Buren | Jackson | Morrall |
| 1905 | Hancock | Boone | Higdon, Salstrom, Van Schoyck |
| 1905 | Linn | Cedar Rapids | Meinzer, Rapps |
| 1910 | Black Hawk | Waterloo | Rapps |
| 1910 | Cerro Gordo | Mason City | Clark, Simmons, Wineman |
| 1910 | Franklin | Ingham | Chaney, Higdon, Squire |
| 1910 | Hancock | Boone | Higdon, Salstrom |
| 1910 | Warren | Lincoln | May |
| 1920 | Cerro Gordo | Mason City | Clark, Wineman |
| 1920 | Franklin | Ross | Chaney, Higdon, Squire |
| 1920 | Hancock | Boone | Higdon, Salstrom, Stringer, Van Schoyck |
| 1920 | Howard | Cresco | Shutt |
| 1920 | Warren | Indianola | May |
| 1925 | Cerro Gordo | Mason City | Chaney, Higdon, Squire |
| 1925 | Jasper | Newton | Clark |
| 1925 | Linn | Cedar Rapids | Clark |
| 1925 | Warren | Indianola | May |
| 1930 | Hancock | Boone | Higdon, Hunsley, Stringer, Van Schoyck |
| 1930 | Hancock | Britt | Fox, Higdon, Salstrom |
| 1930 | Jasper | Newton | Fox, Higdon |
| 1930 | Linn | Cedar Rapids | Meinzer, Rapps |
| 1930 | Polk | Fort Des Moines | Burger |
| 1940 | Hancock | Britt | Fox, Higdon |
| 1940 | Jasper | Newton | Fox, Higdon |
| 1940 | Lyon | Sioux | Wineman |
| 1950 | Hancock | Britt | Fox, Higdon, Stringer |
