| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Washington | Initiative 1000: Initiative Measure No. 1000 concerns allowing certain terminally ill competent adults to obtain lethal prescriptions. | Passed |
| Nov. 3, 2009 | Washington | Referendum 71: Referendum Measure No. 71 concerning rights and responsibilities of state-registered domestic partners | Passed |
| Nov. 6, 2012 | Washington | Referendum 74: Concerning Marriage for Same Sex Couples | Passed |
| Nov. 8, 2016 | Washington | Initiative Measure 735: An Act Relating to the Influence of Corporations and Money in Our Political System | Passed |
| Nov. 5, 2019 | Washington | Initiative Measure No. 1000: Referendum Measure No. 88 | Failed |