| Registered voters in Multnomah County: 402,285 - Link to Election Results |
| Date | Daily Ballot Return | Cumulative | Turnout |
| 4/5/2012 - 4/30/2012 | 515 | 515 | .13% |
| Tue 5-1-2012 | 7,741 | 8,256 | 2.05% |
| Wed 5-2-2012 | 10,986 | 19,242 | 4.78% |
| Thur 5-3-2012 | 4,519 | 23,761 | 5.91% |
| Fri 5-4-2012 | 6,109 | 29,870 | 7.43% |
| Mon 5-7-2012 | 8,472 | 38,342 | 9.53% |
| Tue 5-8-2012 | 11,469 | 49,811 | 12.38% |
| Wed 5-9-2012 | 5,537 | 55,348 | 13.76% |
| Thur 5-10-2012 | 8,753 | 64,101 | 15.93% |
| Fri 5-11-2012 | 6,209 | 70,310 | 17.48% |
| Sat 5-12-2012 | 4,161 | 74,471 | 18.51% |
| Mon 5-14-2012 | 17,856 | 92,336 | 22.95% |
| Tue 5-15-2012 | 68,609 | 160,945 | 40.01% |
Statewide daily turnout (Oregon Secretary of State's office).