ERM or Erm may refer to:
In systems and processes:
- Entity-relationship model
- Employee relationship management
- European Exchange Rate Mechanism
- European Reference Materials
- Enterprise relationship management
- Enterprise risk management
- Electronic resource management, the practices and systems used by libraries to manage electronic information resources
- Empirical risk minimization
In people:
- Tõnis Erm (born 1982), EStonian mountain bike orienteer
- Emir Rodríguez Monegal (1921–1985), Uruguyan literary critic, editor, writer
In biology and medicine:
- ERM protein family (ezrin, radixin, moesin, plus merlin), a family of actin-binding proteins
- Epithelial cell rests of Malassez, in dentistry, residual cells of Hertwig's epithelial root sheath