| Open Addiction |
| Open Arms |
| Open Audio Society |
| Open Bar |
| Open Beach |
| Open Boa |
| Open Carlos |
| Open Casket Wedding |
| Open City |
| Open Door Worship |
| Open Ended |
| Open Folk |
| Open Form Trio |
| Open Hand |
| Open Heavens |
| Open Kamodo |
| Open Kids |
| Open Letter Project |
| Open Mic Karaoke |
| Open Mike Eagle |
| Open Mouth |
| Open on Sundays |
| Open op zondag |
| Open Palms |
| Open Road |
| Open Secret |
| Open SouL |
| Open Space |
| Open To Interpretation |
| Open To Suggestions |
| Open Waters |
| Open Window |
| OpenBottleRecords |
| Openceazn |
| Openeye |
| OpenEyez |
| Openfire. |
| OpenHeart |
| Openize |
| Openmine |
| Openness |
| Openour3rdeye |
| Opensee |
| Openside |
| Openthy |
| Openwork |
| Opera |
| Opera Alaska |
| OPERA band |
| Opera Chaotique |
| Opera Dna |
| Opera i Tiden |
| Opera IX |
| Opera Magna |
| Opera Queen |
| Opera Steve |
| Opera Trance |
| Opera Woo |
| Operación Canguro |
| Operación Mutante |
| Operación Triunfo 2017 |
| Operación Triunfo 2018 |
| Operación Triunfo 2020 |
| Operacion Triunfo III |
| Operacja |
| Operadora |
| Operahaus |
| OPERANT |
| Operantes |
| Operatic Services |
| Operation Code 671 |
| Operation Culture |
| Operation Fishbowl |
| Operation Hurricane |
| Operation Ivan |
| Operation Ivy |
| Operation Kino |
| Operation Optimism |
| Operation Paranoia |
| Operation Underground |
| Operation: Paperclip |
| Operativo Privado |
| Operator |
| Operator Music Band |
| Operator Please |
| Operator16 |
| Operators |
| Opereira |
| Opernchor des Deutschen Nationaltheaters Weimar |
| Opernchor des Theaters Erfurt |
| OPeruano |
| Opetaia Foa'i |
| Opeth |
| Opeun |
| Opeundadeurim |
| Opeutunain |
| Opeyemi Drift |
| Opfer & Täter |
| OPG SVYATIE |
| Opgeblazen |
