2018Final results
2018 election for Idaho Legislative District 21
Idaho House of Representatives · Idaho
2 seats: Thomas E. Dayley (R), Steven C. Harris (R) won.
2 seatsThomas E. DayleyRepublican · winner · incumbent
43.2%15,951
Steven C. HarrisRepublican · winner · incumbent
34.4%12,680
Joshua RobinsonDemocrat
22.4%8,253
36,884 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