2018Final results
2018 election for Minnesota House District 3B
Minnesota House of Representatives · Minnesota
Mary Murphy (D) won with 60.0% of the vote, defeating Keith Macdonald (R) by 20.1 points.
Mary MurphyDemocrat · winner · incumbent
60.0%12,282
Keith MacdonaldRepublican
39.9%8,162
20,459 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET