Local governments
O
| Name | Type | Notes |
|---|---|---|
| Oban | District Council | |
| Ockbrook and Borrowash Parish Council | Parish Council | |
| Ogwr Borough Council | Borough Council | |
| Oldham Borough Council | Borough Council | |
| Omagh Rural District Council | District Council | |
| Ongar RDC | District Council | |
| Orpington UDC | District Council | |
| Oswaldthistle UDC | District Council | |
| Otley Town Council | District Council | |
| Oundle and Thrapston RDC | District Council | |
| Oxford Borough Council | Borough Council | |
| Oxford City Council | City Council | |
| Oxfordshire County Council | County Council |