Barrios de Florida O
- Oak Grove (20)
- Oak Hill (55)
- Oak Ridge (1)
- Oak River (11)
- Oakford Park (8)
- Oakhurst (29)
- Oakland Estates (10)
- Oakland Park (103)
- Oakton Lakes (11)
- Oakwood (1)
- Oakwood Coral Springs (13)
- Ocean Breeze (8)
- Ocean City (21)
- Oceanfront (458)
- Oceanique-Queens Cove (46)
- Oceanway (62)
- Old City (4)
- Old Cutler (1)
- Old Naples (171)
- Old Northeast (32)
- Old Port Cove (11)
- Old Port Village (1)
- Old Saint Augustine (15)
- Old Southeast (8)
- Old West Tampa (16)
- Olde Cypress (18)
- Olympia Heights (22)
- Opa-Locka (32)
- Orange City Estates (1)
- Orange City Terrace (2)
- Orangedale (2)
- Orangewood (3)
- Orient Park (6)
- Oriole Estates (4)
- Oriole Gardens (15)
- Ormond By The Sea (54)
- Ormond Lakes (10)
- Ormond On The Bay (1)
- Ormond Terrace (2)
- Ortega (3)
- Ortega Farms (14)
- Ortega Hills (20)
- Osceola Forest (3)
- Otis (1)
- Outer Aventura (831)
- Outer Boynton Beach (441)
- Outer Coral Springs (346)
- Outer Deland/Deltona (115)
- Outer Delray Beach (659)
- Outer E Outlying-Orange (38)
- Outer Fort Pierce (66)
- Outer Greenacres (13)
- Outer Homestead/South Dade (685)
- Outer Kendall (1)
- Outer North Side (31)
- Outer Ormand Beach (31)
- Outer Palm Beach Gardens/Jupiter (371)
- Outer Pompano Beach/Deerfield Beach (813)
- Outer Port Orange (61)
- Outer Port St Lucie (494)
- Outer Royal Palm Beach/Wellington (524)
- Outer Southwest Pensacola (180)
- Outer St Lucie Inland (14)
- Outer The Islands (11)
- Outer Westchester/Tamiami (89)
- Outer Weston/Davie (203)
- Outlying Punta Gorda (282)
- Overtown (78)