Barrios de Tennessee O
- Oakhaven (18)
- Oakwood (5)
- October Woods (1)
- Old City (3)
- Old Hickory Village (1)
- Old North Knoxville (1)
- Old Sevier (5)
- Ooltewah-Summit (23)
- Orange Mound (29)
- Outer Bellevue (19)
- Outer Bristol (23)
- Outer Charlotte (3)
- Outer Donelson-Hermitage (114)
- Outer Northside (142)
- Outer Red Bank (13)
- Outer Southeast Nashville (184)
- Outer Southside (30)