Reporting snapshot: November 4, 2026, at 4 p.m. CST. These are source-reported outcomes, not certified results. See the current district tracker for later changes and each race’s attribution.
Iowa Decides’ reconciliation of the current legislative roster with reported incoming winners identifies a different occupant in 31 House districts and 11 Senate districts. That is 42 district changes across the 150-seat Legislature. The comparison includes two districts that were already vacant, and it does not assume an outcome for a race that has not been verified here.
The starting point is the official House roster and Senate roster. Incoming outcomes include AP calls, other specifically attributed reporting and reported sole-printed-candidate outcomes. The district-by-district list preserves those distinctions.
The denominator matters
The 31 House changes represent 31% of its 100 districts. The 11 Senate changes represent 22% of all 50 Senate districts, but 44% of the 25 Senate seats on this regular general-election ballot. The other 25 Senate seats have continuing terms. Comparing 31 with 11 alone would miss that difference in how much of each chamber was up for election.
General-election defeats explain only part of the turnover
Here is how the 42 changing districts break down, classified by the outgoing occupant or the district’s prior vacancy:
- 12 own-seat general-election defeats.
- 3 own-seat primary defeats.
- 3 departing legislators who lost bids for another office.
- 17 retirements, withdrawals or other decisions not to seek a return.
- 2 moves to federal office with a reported replacement in the legislative district.
- 3 House-to-Senate moves that leave a different occupant in the former House district.
- 2 previously vacant districts gaining a reported winner.
Those categories total 42 without counting a district twice. The tracker’s current-to-incoming records and departure sources show the members behind the arithmetic. The count describes representation changing; it is not a measure of how many districts switched parties.
A new occupant is not always a first-time lawmaker
Molly Buck, the reported incoming member for House District 41, previously served in the House. Nate Boulton, the reported incoming member for House District 39, previously served in the Senate. Their districts have a different occupant from the current roster, but neither person is new to legislative service. Buck’s official prior record; Boulton’s official prior record.
Barb Kniff McCulla, Heather Matson and Timi Brown-Powers are moving from the House to reported Senate seats. Each move changes both the former House district and the destination Senate district, with each district counted once according to its outgoing occupant. The three-transfer category above refers to the vacated House districts. These members are not leaving the Iowa Legislature. Committee assignments listed for outgoing members describe their current terms; those records do not establish the incoming members’ assignments.
Why the count remains provisional
Twelve of the 42 district changes rely on specifically attributed reports rather than AP calls: seven sole-printed-candidate outcomes, four BrownWinick reports and one WVIK report. The other 30 have AP-called incoming winners. BrownWinick’s reported outcomes are not AP calls; two of the 12 general-election defeats in the breakdown, House District 46 and Senate District 47, use that reported-outcome basis. Each district record links its evidence and preserves the distinction.
Some districts currently classified as retaining the same member also rely on non-AP reporting. A later count or a revised outcome could change the turnover total. The 42 is a dated reporting snapshot, not a final or certified roster. Vote totals from different providers are not combined to make an outcome look more certain.
Two transitions are outside this count
House District 81 is outside the 42 because Iowa Decides had not established a named-source outcome there at this snapshot. A lead is not substituted for a call or a separately sourced report.
Sarah Trone Garriott’s reported election to U.S. House District 3 also creates a separate transition to watch. She currently holds continuing Senate District 14. Its expected future vacancy has no verified successor in this count, so that future district change is not included in the 11 Senate changes. Federal outcome and source; Senate 14 transition status.
These distinctions explain why the tracker separately identifies 38 current legislators expected to leave the Iowa Legislature. That is a count of people, including anticipated federal transitions. The headline 42 is a count of districts with a reported different incoming occupant. Charlie McClintock is excluded from the 38 departing people, and his Senate district is not counted as changing: losing a bid for another office did not end his continuing Senate term.
For readers following the next session, the useful questions are which district has a different representative, which experience is leaving, and which transitions remain unfinished. The map answers the first; the sourced member records and the continuing updates provide the rest. Read the coverage limits and source methodology.