| Olga | Olga |
| Olga Danilova | Olga Danilova |
| Olga Korbut | Olga Korbut |
| Olga Kotlyarova | Olga Kotljarova |
| Olga Kuzenkova | Olga Kuzenkova |
| Olga Morozova | Olga Morozova |
| Olga Nikolaevna of Russia | Olga Nikolajevna Romanova |
| Olga of Kiev | Olga av Kiev |
| Olga Preobrajenska | Olga Preobrazjenskaja |
| Olga Pyleva | Olga Pyljova |
| Olga Ryabinkina | Olga Rjabinkina |
| Olga Zavyalova | Olga Savjalova |
| Olga Zaytseva | Olga Zajtseva |
| Olha Kobylyanska | Olha Kobyljanska |
| olibanum | virak |
| Olidan Power Station | Olidans kraftverk |
| Olifant | Olifant |
| oligarchic | oligarkisk |
| oligarchy | oligarki |
| Oligocene | Oligocen |
| Oligochaeta | Fåborstmaskar |
| oligopoly | oligopol |
| Olimpia | Olympia |
| Olimpia Asunción | Olimpia Asunción |
| Olimpiada Ivanova | Olimpiada Ivanova |
| Olinda | Olinda |
| Olivaceous Warbler | Eksångare |
| olive | oliv |
| Olive Baboon | Babianer |
| olive oil | olivolja |
| Olive oil extraction | Olivpress |
| olive oil mill wastewater | olivoljerester |
| olive tree | olivträd |
| olive-green | olivgrönt |
| Olive-wood | Oliver |
| Oliveira | Olivträd |
| Oliver | Oliver |
| Oliver Bierhoff | Oliver Bierhoff |
| Oliver Cromwell | Oliver Cromwell |
| Oliver Dragojević | Oliver Dragojević |
| Oliver Hardy | Oliver Hardy |
| Oliver Hazard Perry class frigate | Oliver Hazard Perryklassen |
| Oliver Heaviside | Oliver Heaviside |
| Oliver Hirschbiegel | Oliver Hirschbiegel |
| Oliver Kahn | Oliver Kahn |
| Oliver McCall | Oliver McCall |
| Oliver Neuville | Oliver Neuville |
| Oliver Norvelle Hardy | Oliver Norvelle Hardy |
| Oliver Riedel | Oliver Riedel |
| Oliver Sacks | Oliver Sacks |
| Oliver Smithies | Oliver Smithies |
| Oliver Stone | Oliver Stone |
| Oliver Tambo | Oliver Tambo |
| Oliver Twist | Oliver Twist |
| Olives | Olivträd |
| Olivia | Olivia |
| Olivia De Berardinis | Olivia de Berardinis |
| Olivia de Havilland | Olivia de Havilland |
| Olivia Lewis | Olivia Lewis |
| Olivia Lufkin | Olivia |
| Olivia Newton-John | Olivia Newton-John |
| Olivier | Oliver |
| Olivier Besancenot | Olivier Besancenot |
| Olivier Grouillard | Olivier Grouillard |
| Olivier Messiaen | Olivier Messiaen |
| Olivier Panis | Olivier Panis |
| Olivine | Olivin |
| Oliwa | Oliwa |
| Olkusz | Olkusz |
| Ollantaytambo | Ollantaytambo |
| Ollantaytambo District | Ollantaytambo |
| Olli Jokinen | Olli Jokinen |
| Olli Rehn | Olli Rehn |
| Ollie | Ollie |
| Olmaliq | Almalyk |
| Olmec | Olmeker |
| Olmeca | Olmeker |
| Olof Björnsson | Olof Björnsson |
| Olof Palme | Olof Palme |
| Olof Palme assassination | Palmemordet |
| Olof Palme Prize | Olof Palmepriset |
| Olof Skötkonung | Olof Skötkonung |
| Olof Swartz | Olof Swartz |
| Olof Vilhelm Arrhenius | Olof Vilhelm Arrhenius |
| Olofström Municipality | Olofströms kommun |
| Olokun | Olokun |
| Olomouc | Olomouc |
| Olomouc District | Olomouc |
| Olomouc Region | Olomouc |
| Olomouc Synagogue | Synagoga |
| Olonets | Olonets |
| Olongapo City | Olongapo City |
| Olpe | Olpe |
