A-Z of Services
- Oakland (Rochdale)
- Oaklands House
- OCD UK
- Ofsted (Office for Standards in Education)
- The Old Library After School Club
- The Old Library Before School Club
- The Old Library Private Day Nursery
- Older People's Social Eating Group
- Oldham College
- Oldham Integrated Care Centre (ICC)
- Oldham Police Station
- Oldham Road Pharmacy
- Once Upon a Smile
- The Open University
- Oral Health for the elderly programme
- Orkid Ideas - TomTag
- Oulder Hill Community School
- Our Lady and St Paul's After School Club
- Our Lady and St Paul's Before School Club
- Our Lady and St Paul's Roman Catholic Primary School, A voluntary Academy
- Our Place (No Wrong Door)
- Out There - Supporting families of prisoners