Elections / 2018 · Senate · AZ
The Democratic candidate won Arizona's Senate seat D+2.3.
Arizona, 2018. Candidate results and statewide totals below.
Arizona — 2018 Senate result
Source: MIT Election Data + Science Lab, 1976–2024 Senate returns (party-classified by literal ballot party).
Democratic (D)
1,191,100
50.0%
Republican (R)
1,135,200
47.6%
All others
57,442
2.4%
Margin
D+2.3
Candidates
Statewide candidate totals — MIT Election Data + Science Lab, 2018 Senate returns.
| Candidate | Party | Votes | Share |
|---|---|---|---|
| Kyrsten Sinema | DDemocrat | 1,191,100 | 50.0% |
| Martha McSally | RRepublican | 1,135,200 | 47.6% |
| Angela Green | OGreen | 57,442 | 2.4% |
2018 presidential election
Arizona, 2018
DemocraticD+2.3
How it voted
Share of the 2018 vote
| Democratic ✓Democratic | 50.0% | 1,191,100 |
|---|---|---|
| RepublicanRepublican | 47.6% | 1,135,200 |
| OtherAll other candidates | 2.4% | 58,032 |
D+60R+60
15 counties, each filled by 2018 D-vs-R margin. Hover any county for its result.
Arizona's Senate margins
Every contest in our store, 1976–2024
| Year | Margin (D minus R) |
|---|---|
| 1976 | +10.7% |
| 1980 | −1.1% |
| 1982 | +16.6% |
| 1986 | −21.0% |
| 1988 | +15.7% |
| 1992 | −24.2% |
| 1994 | −14.2% |
| 1998 | −41.6% |
| 2000 | −79.3% |
| 2004 | −56.1% |
| 2006 | −9.8% |
| 2010 | −24.3% |
| 2012 | −3.0% |
| 2016 | −13.0% |
| 2018 | +2.3% |
| 2020 | +2.3% |
| 2022 | +4.9% |
| 2024 | +2.4% |