Washington Neighborhoods O
- Ogden (8)
- Old Evergreen Highway (2)
- Olde Town (2)
- Olympic West (1)
- Opportunity (4)
- Orchards (3)
- Orchards Area (14)
- Otis Orchards-East Farms (1)
- Outer Bremerton (27)
- Outer Mercer Island (6)
- Outer Silverdale (16)
- Outlying Issaquah (3)
- Outlying Lynnwood-Snohomish (31)
- Outlying McChord (13)
- Outlying Newcastle (10)
- Outlying Puyallup (18)
- Outlying Vancouver (9)
- Overlake (20)