Voter Turnout (Ballots Returned) for the March 13, 2018 Special Election
Number of registered voters in the Tualatin Valley Fire and Rescue District in Multnomah County: 3,301
| Date | Ballots Received | Cumulative | Turnout Percentage |
| 3/2/2018 | 324 | 324 | 9.82% |
| 3/5/2018 | 49 | 373 | 11.30% |
| 3/7/2018 | 87 | 460 | 13.94% |
| 3/9/2018 | 25 | 485 | 14.69% |
| 3/12/2018 | 44 | 529 | 16.03% |
| 3/13/2018 | 61 | 590 | 17.87% |