| RNP | former code for Rongelap, Marshall Islands 
| Others |
| RNP | Owosso Community Airport, Owosso, Michigan USA (formerly 5D3)
| Others |
| RNP | Rank Not Published
| Others |
| RNP | Ranking Not Published
| Others |
| RNP | Rapid Notification Platform
| Others |
| RNP | Really Nice Pre
| Others |
| RNP | Really Nice Preamp
| Others |
| RNP | Recovering Nurse Program
| Others |
| RNP | Recovery Network of Programs
| Others |
| RNP | Rede Nacional de Pesquisa
| Others |
| RNP | Regional Network Provider
| Others |
| RNP | Registered Nurse Practitioner
| Others |
| RNP | Registro Nacional de Proveedores
| Others |
| RNP | Regular Nail Polish
| Others |
| RNP | Relay Node Placement
| Others |
| RNP | Remote Network Processor
| Others |
| RNP | Renewable Northwest Project
| Others |
| RNP | Required Navigation Performance
| Others |
| RNP | Required Navigational Performance
| Others |
| RNP | Research for Nursing Practice
| Others |
| RNP | Research Network
| Others |
| RNP | Retard now posting
| Others |
| RNP | Ribo-Nucleo-Protein
| Others |
| RNP | Riverside Neighborhood Partnership
| Others |
| RNP | Road Network Projects
| Others |
| RNP | Rosa Nel Pugno
| Others |
| RNP | Royalty Nobility and Poverty
| Others |
| RNP | Rwanda National Police
| Others |