- Noujaim, Jehane1
- Novák, Zoltán1
- O'Brien, James A.1
- O'Meara, Michael1
- Oláh J., Gábor1
- Opačić, Petar1
- Open Society Foundation for Albania1
- Open Society Fund–Bosnia and Herzegovina1
- Open Society Institute Assistance Foundation–Uzbekistan1
- Open Society Institute–Croatia1
- Organization for Security and Co-operation in Europe. Office for Democratic Institutions and Human Rights1
- Ostojić, Arsen A.1
- Ozan, Pepe1
- Paccagnella, Lorenzo1
- Panfilov, Oleg1
- Paounov, Andrey1
- Papp, Gábor Zsigmond1
- Paulicelli, Eugenia1
- Pecora, Paulo1
- Pejó, Róbert1