99chambers
Still countingUnofficial results

North Dakota Legislative District 11

North Dakota State Senate · North Dakota

Tim Mathern leads Christine O'Riley by 26.1 points with 100% of the expected vote counted. The race has not been called.

Staggered terms in both chambers

Tim MathernDemocrat · leading · incumbent
63.0%3,265
Christine O'RileyRepublican
36.9%1,913
NonpartisanNonpartisan
0.1%6
100% of the expected vote counted · 5,184 votes

Source: civicAPI unofficial results and race callsUpdated Nov 4, 2026, 4:55 AM ET

Where the race moved

Against the 2024 presidential vote

The seat's recent races

EvenD+11.92024 Pres.D+26.12026 Senate

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)

Money in this race

Each line compares the two campaigns on one scale.

Tim MathernChristine O'Riley
$16.9K
Raised by the campaign
$13.3K
$2.4K
Spent by the campaign
$0

Campaign money: North Dakota Secretary of State, through Sep 29, 2026; North Dakota Secretary of State, through Sep 19, 2026.

Source: North Dakota Secretary of State campaign filingsUpdated Sep 19, 2026

Pre-election forecast (final, Nov 3)

Our model's last run before Election Day, Nov 3, 2026. It no longer updates.

Tim Mathern
>99%
Christine O'Riley
<1%
Projected margin
D+22.5
How the forecast works →

The candidates

Tim Mathern (D)
Incumbent senatorChristine O'Riley (R)
Psychologist

Also on the ballot: Nonpartisan (Nonpartisan), 0.1%