Voter Turnout by day - November 2018 General Election
Number of registered voters in Multnomah County: 531,729
| Date | Ballots Received | Cumulative | Turnout Percentage |
| 09/27/2018-10/18/2018 (military/overseas/early absentee) | 1228 | 1228 | .0.23% |
| Friday, 10/19/2018 | 5162 | 6390 | 1.20% |
| Monday, 10/22/2018 | 12378 | 18768 | 3.53% |
| Tuesday, 10/23/2018 | 24564 | 43332 | 8.15% |
| Wednesday, 10/24/2018 | 10327 | 53659 | 10.09% |
| Thursday, 10/25/2018 | 17285 | 70944 | 13.34% |
| Friday, 10/26/2018 | 8633 | 79577 | 14.97% |
| Monday, 10/29/2018 | 31043 | 110620 | 20.80% |
| Tuesday, 10/30/2018 | 15846 | 126466 | 23.78% |
| Wednesday, 10/31/2018 | 26793 | 153259 | 28.82% |
| Thursday, 11/01/2018 | 14676 | 167935 | 31.58% |
| Friday, 11/02/2018 | 29251 | 197186 | 37.08% |
| Saturday, 11/03/2018 | 16619 | 213805 | 40.21% |
| Monday, 11/05/2018 | 63642 | 277447 | 52.18% |
| Tuesday, 11/06/2018 (Election Day) | 105878 | 383325 | 72.09% |
Link to statewide voter turnout.
Historical Turnout in Multnomah County