RU may stand for the following universities:
- Radboud University Nijmegen, in Nijmegen, Netherlands
- Radford University, in Virginia, USA
- Rajshahi University in Bangladesh
- Ramkhamhaeng University in Thailand
- Regis University in Colorado, USA
- Reykjavík University Iceland
- Rhodes University in Grahamstown, South Africa
- Rockefeller University in New York, USA
- Rockhurst University in Missouri, USA
- Roosevelt University in Chicago, Illinois, USA
- Rowan University in New Jersey, USA
- Ruse University in Bulgaria
- Rutgers University in New Jersey, USA
- Ryerson University in Ontario, Canada