CalledUnofficial results
Pennsylvania Senate District 12
Pennsylvania State Senate · Pennsylvania
Maria Collett won re-election by 32.5 points over Robert F. Costello III.
Staggered Senate
Maria CollettDemocrat · winner · incumbent
66.2%81,896
Robert F. Costello IIIRepublican
33.8%41,719
73% of the expected vote counted · 123,615 votes
Source: civicAPI unofficial results and race callsUpdated Nov 5, 2026, 3:27 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.
Maria CollettNo Republican
$1.9K
Raised by the campaign
—
$1.9K
Spent by the campaign
—
$0
Cash on hand
—
Campaign money: Pennsylvania Department of State, through Apr 27, 2026.
Source: Pennsylvania Department of State campaign filingsUpdated Apr 27, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
- Maria Collett
- >99%
- Robert F. Costello III
- <1%
- Projected margin
- D+23.4