| District ID | 3rd District |
| Representative | Earl Blumenauer |
| Party Affiliation | Democrat |
| Partisan Voting Index (PVI) | D+24 |
| 97009 |
| 97010 |
| 97011 |
| 97014 |
| 97015 |
| 97019 |
| 97022 |
| 97023 |
| 97024 |
| 97028 |
| 97030 |
| 97031 |
| 97041 |
| 97044 |
| 97045 |
| 97049 |
| 97055 |
| 97060 |
| 97067 |
| 97080 |
| 97086 |
| 97089 |
| 97202 |
| 97203 |
| 97206 |
| 97211 |
| 97212 |
| 97213 |
| 97215 |
| 97216 |
| 97217 |
| 97218 |
| 97220 |
| 97227 |
| 97230 |
| 97232 |
| 97233 |
| 97236 |
| 97253 |
| 97266 |
| 97282 |
| 98605 |
| 98607 |
| 98660 |