| Lyle Brehm | Iowa County Engineers Association | Undecided | GA89 |
| Colin Tadlock | Iowa Department of Agriculture & Land Stewardship | Undecided | GA89 |
| Doug Struyk | Iowa Drainage District Association | Supporting | GA89 |
| Jennifer Dorman | Iowa Drainage District Association | Supporting | GA89 |
| Jim Carney | Iowa Drainage District Association | Supporting | GA89 |
| John Torbert | Iowa Drainage District Association | Supporting | GA89 |
| Mona Bond | Iowa Drainage District Association | Supporting | GA89 |
| Chip Baltimore | Iowa Environmental Council | Undecided | GA89 |
| Emilee Harris-Puricelli | Iowa Farmers Union | Undecided | GA89 |
| Nick Laning | Iowa Farmers Union | Undecided | GA89 |
| Threase Harms | Iowa Farmers Union | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Supporting | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA89 |
| William Peterson | Iowa State Association of Counties | Supporting | GA89 |
| Jamie Cashman | Iowa State Association of County Auditors | Supporting | GA89 |
| Kristi Harshbarger | Iowa State Association of County Auditors | Supporting | GA89 |
| Lucas Beenken | Iowa State Association of County Auditors | Supporting | GA89 |
| William Peterson | Iowa State Association of County Auditors | Supporting | GA89 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA89 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Supporting | GA89 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA89 |
| William Peterson | Iowa State Association of County Supervisors | Supporting | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |
| Brad Epperly | res | Undecided | GA89 |
| Dustin Miller | res | Undecided | GA89 |