Elections / 2018 · Senate · WA
Washington — 2018 U.S. Senate election
Recent presidential results
Akashicstate2018 Senate electionWashington · U.S. SenateCantwellD+16.9
How it voted
Share of the 2018 vote
| Maria Cantwell (i) ✓Democrat | 58.4% | 1,803,364 |
|---|---|---|
| Susan HutchisonRepublican | 41.6% | 1,282,804 |
2018Senate margin
D+60R+60
39 counties, each filled by 2018 D-vs-R margin. Hover any county for its result.
County-level results (39 counties) — table
| County | Winner | Margin |
|---|---|---|
| ADAMS, WA | Republican | R+35.5 |
| ASOTIN, WA | Republican | R+16.4 |
| BENTON, WA | Republican | R+24.9 |
| CHELAN, WA | Republican | R+11.9 |
| CLALLAM, WA | Democratic | D+1.3 |
| CLARK, WA | Democratic | D+5.9 |
| COLUMBIA, WA | Republican | R+33.5 |
| COWLITZ, WA | Republican | R+7.7 |
| DOUGLAS, WA | Republican | R+27.7 |
| FERRY, WA | Republican | R+23.8 |
| FRANKLIN, WA | Republican | R+19.5 |
| GARFIELD, WA | Republican | R+32.5 |
| GRANT, WA | Republican | R+38.4 |
| GRAYS HARBOR, WA | Republican | R+4.4 |
| ISLAND, WA | Democratic | D+6.4 |
| JEFFERSON, WA | Democratic | D+37.6 |
| KING, WA | Democratic | D+48.3 |
| KITSAP, WA | Democratic | D+12.9 |
| KITTITAS, WA | Republican | R+13.8 |
| KLICKITAT, WA | Republican | R+8.3 |
| LEWIS, WA | Republican | R+34.6 |
| LINCOLN, WA | Republican | R+42.5 |
| MASON, WA | Republican | R+4.3 |
| OKANOGAN, WA | Republican | R+12.8 |
| PACIFIC, WA | Democratic | D+1.8 |
| PEND OREILLE, WA | Republican | R+27.7 |
| PIERCE, WA | Democratic | D+6.7 |
| SAN JUAN, WA | Democratic | D+45.2 |
| SKAGIT, WA | Democratic | D+3.0 |
| SKAMANIA, WA | Republican | R+4.6 |
| SNOHOMISH, WA | Democratic | D+14.8 |
| SPOKANE, WA | Republican | R+1.5 |
| STEVENS, WA | Republican | R+35.5 |
| THURSTON, WA | Democratic | D+17.1 |
| WAHKIAKUM, WA | Republican | R+10.7 |
| WALLA WALLA, WA | Republican | R+7.3 |
| WHATCOM, WA | Democratic | D+19.5 |
| WHITMAN, WA | Democratic | D+9.0 |
| YAKIMA, WA | Republican | R+16.3 |
presidential baselinePresident 2016D+15.7Senate 2018D+16.9vs. baselineD+1.2
Washington's 2018 Senate race ran 1.2 points more Democratic than its 2016 presidential margin.
Washington's Senate margins
Every contest in our store, 1976–2024
| Year | Margin (D minus R) |
|---|---|
| 1976 | +47.6% |
| 1980 | −8.3% |
| 1982 | +44.7% |
| 1986 | +2.0% |
| 1988 | −2.2% |
| 1992 | +8.0% |
| 1994 | −11.5% |
| 1998 | +16.8% |
| 2000 | +0.1% |
| 2004 | +12.2% |
| 2006 | +16.9% |
| 2010 | +4.7% |
| 2012 | +20.9% |
| 2016 | +18.0% |
| 2018 | +16.9% |
| 2022 | +14.5% |
| 2024 | +18.5% |
Same ballot, 2018WA
Source. MIT Election Data + Science Lab — 2018 US Senate returns, party-classified by literal ballot party · county returns aggregated from precinct-level results. Real returns — nothing estimated.