Washington Neighborhoods O
- Ogden (7)
- Old Evergreen Highway (3)
- Olde Town (1)
- Olympic West (1)
- Opportunity (4)
- Orchards (1)
- Orchards Area (14)
- Outer Bremerton (21)
- Outer Mercer Island (5)
- Outer Silverdale (18)
- Outlying Issaquah (6)
- Outlying Lynnwood-Snohomish (32)
- Outlying McChord (13)
- Outlying Newcastle (10)
- Outlying Puyallup (22)
- Outlying Vancouver (20)
- Overlake (22)