- Obsession Shapewear
- One Golden Thread
- Oilily
- Orchard Street Apparel
- Off Ya Tree
- OMG Fashion
- Oilily
- Obviously Apparel
- Oliver Jewellery
- Ouro Goods
- Osloh Jeans
- Otto JP
- Objectrare
- Orange Fashion Village
- ODIN
- Olive Mae Clothing
- Olympia Gloves
- Outsiders Watches
- Obaku
- Optic Nerve
- Oakley Vault
- Oxypas
- Orcas Lucille
- Officine Generale
- Old Friend
- Oursoin
- OceanZen Bikini
- OMG Accessories
- OFFHOURS
- Ochox
- Origin 31
- Out of the Corner
- Oveila
- Olivia Rubin
- Out Of My Kloset
- Owkay Clothing
- Olivier Baby
- Ox & Bull Trading Co.
- Ovan
- OuiHours
- Olga
- Olivia + Ocean
- Our 5 Loves
- Oryany
- Ops & Ops
- Organize My Bag
- Onne Swimwear
- Of One Sea
- Oodji
- Ocean Beach Company
- Olesstore
- Opolisclothing
- Ohio Clothing
- One World Peace
- Ouchhh
- Only The Blind
- Oh Yeah Apparel
- Outhorn
- Oregrown
- Olivaceous
- Original Paperbacks
- Origins Apparel
- Octer
- Original Goat
- Oso & Me
- On U Jewelry
- Orsle
- Olivia's Bow Club
- OOF Wear
- OTZ Shoes
- Old Bull Lee
- Oxcloth
- Osgoode Marley
- OAMC
- Okayok
- One Little Monkey
- Olli Life
- OBJEKTS
- ObjectsOfBeauty.com
- Original Ronnie Needham Jewelry