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25 of 49 seats in theWashington State Senate 25 seats needed for a majority | |||||||||||||||||||||||||||||||||||||
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 Results: Democratic gain Democratic hold Republican hold Democrat caucusing with Republicans hold No election | |||||||||||||||||||||||||||||||||||||
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The2018 Washington State Senate elections took place as part of the biennialUnited States elections.Washington state voters elected state senators in 25 of the state's49 Senate districts. The other 24 state senators were not up for re-election until the next biennial election in 2020. State senators serve four-year terms in theWashington State Senate. A statewide map of Washington's state legislative districts is provided by the Washington State Legislaturehere,Archived 2018-10-24 at theWayback Machine.
Atop two primary election on August 7, 2018, determined which candidates appear on the November 6 general election ballot. Each candidate is allowed to write in their party preference so that it appears as they desire on the ballot.[1]
Following the 2016 state senate elections,Republicans maintained effective control of the Senate, 25–24 because self-identified Democrat Tim Sheldoncaucuses with the Republicans. However, in 2017Democrats regained control of theWashington State Senate after DemocratManka Dhingra won aspecial election inWashington's 45th legislative district.
Democrats expanded their caucus's majority to 28–21 by further flipping the 26th, 30th, and 47th districts. Tim Sheldon was reelected as a Democrat, but continued to caucus with the Republicans.
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| 2018 Washington State Senate election Primary election — August 7, 2018[a] | ||||||
|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Candidates | Advancing to general | Seats contesting | |
| Democratic | 536,781 | 61.87% | 37 | 28 | 24 | |
| Republican | 302,667 | 34.89% | 26 | 19 | 19 | |
| Independent | 15,375 | 1.77% | 6 | 1 | 1 | |
| Libertarian | 9,998 | 1.15% | 4 | 1 | 1 | |
| No party preference | 2,737 | 0.32% | 2 | 0 | 0 | |
| Totals | 2,869,914 | 100.00% | 75 | 49 | — | |
| 2018 Washington State Senate election General election — November 6, 2018[a] | ||||||||
|---|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Not up | Contested | Before | After | +/– | |
| Democratic | 982,741 | 64.55% | 10 | 7 | 25 | 28 |  3 | |
| Republican | 516,476 | 33.92% | 12 | 11 | 24 | 21 |  3 | |
| Independent | 13,538 | 0.89% | 0 | 0 | 0 | 0 | 0 | |
| Libertarian | 9,707 | 0.64% | 0 | 0 | 0 | 0 | 0 | |
| Totals | 1,522,462 | 100.00% | 24 | 25 | 49 | 49 | — | |
| Source | Ranking | As of |
|---|---|---|
| Governing[2] | Likely D | October 8, 2018 |
** Incumbent did not seek re-election.
| State Senate district | Incumbent | Party | Elected senator | Party | ||
|---|---|---|---|---|---|---|
| 6th | Michael Baumgartner** | Rep | Jeff Holy | Rep | ||
| 7th | Shelly Short | Rep | Shelly Short | Rep | ||
| 8th | Sharon Brown | Rep | Sharon Brown | Rep | ||
| 13th | Judy Warnick | Rep | Judy Warnick | Rep | ||
| 15th | Jim Honeyford | Rep | Jim Honeyford | Rep | ||
| 21st | Marko Liias | Dem | Marko Liias | Dem | ||
| 26th | Jan Angel** | Rep | Emily Randall | Dem | ||
| 29th | Steve Conway | Dem | Steve Conway | Dem | ||
| 30th | Mark Miloscia | Rep | Claire Wilson | Dem | ||
| 31st | Phil Fortunato | Rep | Phil Fortunato | Rep | ||
| 32nd | Maralyn Chase | Dem | Jesse Salomon | Dem | ||
| 33rd | Karen Keiser | Dem | Karen Keiser | Dem | ||
| 34th | Sharon Nelson** | Dem | Joe Nguyen | Dem | ||
| 35th | Tim Sheldon | Dem* | Tim Sheldon | Dem* | ||
| 36th | Reuven Carlyle | Dem | Reuven Carlyle | Dem | ||
| 37th | Rebecca Saldaña | Dem | Rebecca Saldaña | Dem | ||
| 38th | John McCoy | Dem | John McCoy | Dem | ||
| 39th | Keith Wagoner | Rep | Keith Wagoner | Rep | ||
| 42nd | Doug Ericksen | Rep | Doug Ericksen | Rep | ||
| 43rd | Jamie Pedersen | Dem | Jamie Pedersen | Dem | ||
| 44th | Steve Hobbs | Dem | Steve Hobbs | Dem | ||
| 45th | Manka Dhingra | Dem | Manka Dhingra | Dem | ||
| 46th | David Frockt | Dem | David Frockt | Dem | ||
| 47th | Joe Fain | Rep | Mona Das | Dem | ||
| 48th | Patty Kuderer | Dem | Patty Kuderer | Dem | ||
Source:[3]
