Flipped from RepublicanCalledUnofficial results
Iowa Senate District 21
Iowa State Senate · Iowa
Heather Matson flipped the seat for Democrats, winning by 12.6 points over John Hollinrake.
Staggered Senate
Heather MatsonDemocrat · winner
56.3%19,860
John HollinrakeRepublican
43.6%15,398
Write-inOther party
0.1%34
35,292 votes
Source: Iowa Secretary of State unofficial resultsUpdated Nov 7, 2026, 1:35 PM ET
Where the race moved
Against the 2024 presidential vote
The seat's recent races
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Money in this race
Each line compares the two campaigns on one scale.
Heather MatsonJohn Hollinrake
$81.8K
Raised by the campaign
$16.5K
$7.6K
Spent by the campaign
$12K
Campaign money: Iowa Ethics and Campaign Disclosure Board, through May 26, 2026; Iowa Ethics and Campaign Disclosure Board, through May 3, 2026.
Source: Iowa Ethics and Campaign Disclosure Board campaign filingsUpdated May 3, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
- Heather Matson
- 93%
- John Hollinrake
- 7%
- Projected margin
- D+11.5