Companies catalogue
- O'Toole Cherie, Boronia
- O. E. Consultancy, Hawthorn East
- O.E. Consultancy, Hawthorn
- OFP Yarra Valley, Kilsyth
- OP FIT, Clyde North
- OXSTONE MARBLE & GRANITE, Sunshine
- Oasis (Oasis Bakery), Murrumbeena
- Occupational Safety & Health Associates, Doncaster
- OceanBlue: Freelance Web, Mobile & Graphic Designers / Developers, South Melbourne
- Oggi Hair Studio, Balwyn North
- Oh My Grill, Taylors Lakes
- Old Favourites, Sandgate
- Olive Graphics, Botanic Ridge
- Olive Hair Salon, Carnegie
- Olsson Industries, Morningsid
- Omnia Hair, Doreen
- Omniblend Innovation, Brooklyn
- Once-Upon-A-Time Vintage Cards and Images, Heidelberg West
- One Fitness, Brighton
- One Health & Fitness, South Morang
- One Two Eight Hair Salon, Hoppers Crossing
- One Two Hair Salon, Carrum Downs
- OneGlass, Preston
- Onyx, Roxburgh Park
- Opal Hair, Officer
- Open Light Wellbeing - Counselling and Yoga, Elwood
- Operation Fitness, South Melbourne
- Optima Health & Fitness, Mornington
- Optimal Rx Pty Ltd., Mount Waverley
- Orange Hair, Box Hill
- Orange Hair Footscray, Footscray
- Organic Oz, Bentleigh East
- Organica Eco Salon, Berwick
- Organika Hair Carlton, Carlton
- Organika Hair Elwood, Elwood
- Orlando's Greek Delicatessen, Doncaster
- Orlando's Mediterranean Grocers, Doncaster East
- Ormond Health & Fitness, Ormond
- Orora, Thomastown
- Orora, Scoresby
- Osborne Design Strategy, Narre Warren
- Oscar Oscar Salons, Cheltenham
- Oscar Oscar Salons Chadstone, Chadstone
- Oscar Oscar Salons Doncaster, Doncaster
- Oscar Oscar Salons Highpoint, Maribyrnong
- Oscar Oscar Salons St Kilda, Saint Kilda
- Osteologic Healthcare Diamond Creek, Diamond Creek
- Otto Air Conditioning, Sunshine Coast
- Outdoor Gym Equipment, Rowville
- Outfit 24 Cranbourne - Independent Gym Cranbourne | Narre Warren, Cranbourne
- Outlaws Edge, Mornington
- Outlines, Albert Park
- Overseas Glass Agencies Pty Ltd, Braeside
- Owl Graphic Design, Kew East
- Oxhey & Bushey Salon, Fitzroy North
- Oxworks - Fencing, Gates, Balustrades and Screens, Campbellfield
- Oz BBQ Sales, Carrum Downs
- Oz Graphics, Campbellfield
- OzRifleScopes - Australian Rifle Scope Experts, Bayswater
- Ozone Australia Pty Ltd, Braeside
- Ozone Australia Pty. Ltd., Moorabbin
- oOh!, Teneriffe