- O’Bil Bil
- O'briens Hill
- O’Connell
- O'Connor
- O'Connor
- O’Halloran Hill
- O'Malley
- O'Reilly
- O'Sullivan Beach
- Oak Beach
- Oak Flats
- Oak Park
- Oak Valley
- Oakbank
- Oakdale
- Oakden
- Oakdowns
- Oakenden
- Oakey
- Oakey Creek
- Oakford
- Oakhampton
- Oakhampton Heights
- Oakhurst
- Oakhurst
- Oaklands
- Oaklands Junction
- Oaklands Park
- Oakleigh
- Oakleigh East
- Oakleigh South
- Oaks
- Oaks Estate
- Oakvale
- Oakview
- Oakville
- Oakwood
- Oakwood
- Oaky Creek
- Oaky Park
- Oallen
- Oatlands
- Oatlands
- Oatley
- Ob Flat
- Oban
- Oberon
- Obi Obi
- Obley
- Obum Obum
- Ocean Beach
- Ocean Grove
- Ocean Reef
- Ocean Shores
- Ocean View
- Ocean Vista
- Officer
- Officer South
- Ogilvie
- Ogmore
- Okeden
- Olary
- Old Adaminaby
- Old Bar
- Old Beach
- Old Bonalbo
- Old Calperum
- Old Erowal Bay
- Old Grevillia
- Old Guildford
- Old Junee
- Old Morago
- Old Noarlunga
- Old Plains
- Old Reynella
- Old Station
- Old Talgai
- Old Tallangatta
- Old Toongabbie
- Oldbury
- Oldina
- Olinda
- Olinda
- Olympic Dam
- Oman-Ama
- Ombersley
- Omeo
- Omeo Valley
- Ondit
- One Mile
- One Tree
- One Tree Hill
- Ongerup
- Onkaparinga Hills
- Onslow
- Oodla Wirra
- Oodnadatta
- Oolong
- Oonah
- Oonoonba
- Ooralea
- Ootha
- Opalton
- Ophir
- Opossum Bay
- Ora Banda
- Orallo
- Oran Park
- Orana
- Orange
- Orange Creek
- Orange Grove
- Orange Hill
- Orangeville
- Orbost
- Orchard Hills
- Ord River
- Orelia
- Orford
- Orford
- Orielton
- Orient
- Orient Point
- Orion
- Ormeau
- Ormeau Hills
- Ormiston
- Ormond
- Orroroo
- Orrvale
- Orton Park
- Osborne
- Osborne
- Osborne Park
- Osmaston
- Osmington
- Osterley
- Osterley
- Oswald
- Otago
- Otford
- Ottaba
- Ottoway
- Oura
- Ourimbah
- Ournie
- Ouse
- Outer Harbor
- Outtrim
- Ouyen
- Ovens
- Overland Corner
- Ovingham
- Owanyilla
- Owen
- Owens Creek
- Owens Gap
- Oxenford
- Oxford
- Oxford Falls
- Oxley
- Oxley
- Oxley
- Oxley
- Oxley Flats
- Oxley Island
- Oxley Park
- Oxley Vale
- Oyster Bay
- Oyster Cove
- Oyster Cove
- Oyster Creek
- Ozenkadnook
