City
- Adrian
- Baker City
- Brogan
- Durkee
- Enterprise
- Haines
- Halfway
- Harper
- Hereford
- Huntington
- Jamieson
- Joseph
- La Grande
- North Powder
- Nyssa
- Ontario
- Outside City Limits
- Sumpter
- Unity
- Vale
- Wallowa
- Warren
County
Zip Code
- 97053
- 97338
- 97814
- 97828
- 97833
- 97837
- 97843
- 97846
- 97850
- 97857
- 97867
- 97877
- 97884
- 97885
- 97901
- 97903
- 97905
- 97906
- 97907
- 97909
- 97913
- 97913-0000
- 97913-3635
- 97913-3850
- 97913-3920
- 97914
- 97914-4138
- 97914-8466
- 97914-9999
- 97918
- 97918-0000
School District
- Annex School District #29
- Baker School District 5J
- Harper School District #66
- Huntington School District 16J
- Nyssa School District 26
- Ontario School District 8C
- Vale School District 84