- Oakland
- Orelia
- Oaks of Clear Creek
- Orchard
- Old Houston Place
- O'Donnell Place
- Obregon
- Olmos
- Ohio
- Oakland
- Oak Cliff Acres
- Ogden
- Oak Brook West
- Oak Cliff Place
- Oak Creek Village
- Oak Forest
- Oak Glen Place
- Oak Harbor
- Oak Knoll Estates
- Oak Park
- Oak Park Trails
- Oakhurst Shores
- Oakland Plaza
- Oaks of Atascocita
- Oaks of Devonshire
- Oaks of Inwood
- Oakwilde
- Oakwood Glen
- Oates Prairie
- Olcott