OPR
The abbreviation OPR stands for:
- The Old Catholic Order of Port Royal
- The Vatican pilgrimage office Opera Romana Pellegrinaggi
- Optimized Power Reactor, a South Korean nuclear reactor type
OPR as distinguishing signs on license plate:
- Germany: Ostprignitz -Ruppin
- Poland: powiat Prudnicki in the Opole Voivodeship
- Disambiguation
- Abbreviation