RRT or Rrt may refer to:
- Radio Reconnaissance Platoon
- Railroad Tycoon (series)
- Rainbow Round Table
- Rapidly exploring random tree
- Reference Rendering Transform
- Registered Respiratory Therapist
- Renal replacement therapy
- Randomized response technique
- Rational root theorem in mathematics
- Refugee Review Tribunal in Australia.
- Recommended Replacement Time
- Warroad International Memorial Airport, airport in Warroad, Minnesota
