RMJ
| Acronym | Definition |
|---|---|
| RMJ | Ring Missionarischer Jugendbewegungen (German: Ring Missionary Youth Movements; est. 1974) |
| RMJ | Richard Mentor Johnson (ninth Vice President of the United States) |
| RMJ | Rocky Mountain Journal of Mathematics (Tempe, AZ) |
| RMJ | Radio des Meilleurs Jours (French radio station) |
| RMJ | Réseau Mennaisien Jeunes (French: Mennaisien Youth Network) |
| RMJ | R. Marshall Jones, Inc. (est. 1992; West Palm Beach, FL) |
| RMJ | Railway and Modellers Junction (UK) |