Iowa
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| Rank | Grower | Weight | Year | Weigh-off | Hometown |
| Top Ten Average | 1571.8 | Pounds | Updated: | 11/01/2018 |
| Don Young | 1662 | 2007 | Anamosa | Des Moines, IA |
| Don Young | 1658 | 2009 | Half Moon Bay, CA | Des Moines, IA |
| Don Young | 1641 | 2016 | Pawnee City, NE | Des Moines, IA |
| Don Young | 1622 | 2009 | Anamosa | Des Moines, IA |
| Pete Caspers | 1587 | 2017 | Anamosa | Peosta, IA |
| Carlson & Peterson | 1579 | 2014 | Anamosa | Clinton, IA |
| Carlson & Peterson | 1563 | 2016 | Anamosa | Clinton, IA |
| Ralph Trumm | 1546.5 | 2014 | Anamosa | Cascade, IA |
| Pete Caspers | 1442.5 | 2018 | Anamosa | Peosta, IA |
| Young & Rhodes | 1417 | 2018 | Anamosa | Des Moines, IA |