May 2008 Election - Voter Turnout
| County | Registered Voters | Ballots Cast | Percent |
| Multnomah | 320,970 | 200,182 | 62.37% |
| Clackamas | 476 | 275 | 57.77% |
| Washington | 812 | 444 | 54.68% |
| TOTAL | 322,258 | 200,901 | 62.34% |
Percent of eligible Portland voters casting ballots in 2008 Primary Election: 62.34%