Number of registered voters in Multnomah County: 503,386
| Date | Ballots Received | Cumulative | Turnout Percentage |
| 04/06/2017-04/24/2017 | 93 | 93 | 0.02% |
| Thursday, 04/27/2017 | 245 | 338 | 0.07% |
| Friday, 04/28/2017 | 5,118 | 5,456 | 1.08% |
| Monday, 05/01/2017 | 10,630 | 16,086 | 3.19% |
| Tuesday, 05/02/2017 | 11,307 | 27,393 | 5.44% |
| Wednesday, 05/03/2017 | 7,161 | 34,554 | 6.86% |
| Thursday, 05/04/2017 | 4,393 | 38,947 | 7.74% |
| Friday, 05/05/2017 | 5,492 | 44,439 | 8.83% |
| Monday, 05/08/2017 | 8,297 | 52,736 | 10.48% |
| Tuesday, 05/09/2017 | 8,784 | 61,520 | 12.22% |
| Wednesday, 05/10/2017 | 4,258 | 65,778 | 13.07% |
| Thursday, 05/11/2017 | 6,988 | 72,766 | 14.46% |
| Friday, 05/12/2017 | 8,427 | 81,193 | 16.13% |
| Monday, 05/15/2017 | 20,602 | 101,795 | 20.22% |
| (updated 3:30 pm, 5/31) Tuesday, 05/16/2017 | 54,858 | 156,653 | 31.12% |