Washington held special elections on November 5, 2013, deciding 3 legislative seats.
Legislature
- House (98 seats): 55 D, 43 R before the election, 55 D, 43 R after; control stayed with Democrats.
- Senate (49 seats): 26 D, 23 R before the election, 0 D, 0 R after.
Legislative races
Ballot measures
| Measure | Description | Result |
|---|
| Advisory Vote 3 | Eliminates a leasehold excise tax credit for taxpayers who lease publicly-owned property | Passed (52.47% yes) |
| Advisory Vote 4 | Imposes an aircraft excise tax on commuter air carriers | Passed (53.54% yes) |
| Advisory Vote 5 | Extends the insurance premium tax to some insurance for pediatric oral services | Failed (39.52% yes) |
| Advisory Vote 6 | Eliminates a retail sales tax exemption for certain telephone and telecommunications services | Failed (47.74% yes) |
| Advisory Vote 7 | Extends estate tax on certain property transfers and increased rates for estates over $4,000,000 | Passed (51.23% yes) |
| Initiative 517 | Penalties for harassing petition organizers, limit pre-election litigation, extend signature gathering time | Failed (37.29% yes) |
| Initiative 522 | Requires labels on food offered for sale if food is made with genetic material changed | Failed (48.91% yes) |