2018Final results
2018 election for Arizona Legislative District 21
Arizona State Senate · Arizona
Rick Gray (R) won with 52.1% of the vote, defeating Kathy Knecht (Ind) by 4.5 points.
Rick GrayRepublican · winner
52.1%40,869
Kathy KnechtIndependent
47.7%37,380
78,400 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