Barrios de Florida O
- Oak Grove (16)
- Oak Hill (41)
- Oak Ridge (1)
- Oak River (4)
- Oakford Park (4)
- Oakhurst (22)
- Oakland Estates (4)
- Oakland Park (104)
- Oakton Lakes (13)
- Oakwood (1)
- Oakwood Coral Springs (8)
- Ocean Breeze (6)
- Ocean City (18)
- Oceanfront (459)
- Oceanique-Queens Cove (52)
- Oceanway (53)
- Old City (4)
- Old Cutler (1)
- Old Naples (163)
- Old Northeast (26)
- Old Port Cove (11)
- Old Saint Augustine (19)
- Old Southeast (8)
- Old West Tampa (11)
- Olde Cypress (18)
- Olympia Heights (25)
- Opa-Locka (28)
- Orange City Estates (1)
- Orange City Terrace (1)
- Orangedale (3)
- Orangewood (3)
- Orient Park (7)
- Oriole Estates (6)
- Oriole Gardens (14)
- Ormond By The Sea (53)
- Ormond On The Bay (2)
- Ormond Terrace (2)
- Ortega (3)
- Ortega Farms (12)
- Ortega Forest (2)
- Ortega Hills (11)
- Osceola Forest (6)
- Otis (3)
- Outer Aventura (886)
- Outer Boynton Beach (441)
- Outer Coral Springs (346)
- Outer Deland/Deltona (87)
- Outer Delray Beach (708)
- Outer E Outlying-Orange (20)
- Outer Fort Pierce (61)
- Outer Greenacres (12)
- Outer Homestead/South Dade (636)
- Outer Kendall (5)
- Outer North Side (26)
- Outer Ormand Beach (30)
- Outer Palm Beach Gardens/Jupiter (396)
- Outer Pompano Beach/Deerfield Beach (742)
- Outer Port Orange (49)
- Outer Port St Lucie (494)
- Outer Royal Palm Beach/Wellington (493)
- Outer Southwest Pensacola (142)
- Outer St Lucie Inland (11)
- Outer The Islands (4)
- Outer Westchester/Tamiami (70)
- Outer Weston/Davie (215)
- Outlying Punta Gorda (263)
- Overtown (59)