ERD may refer to:
- ERD, IATA code for Berdyansk Airport, Ukraine
- Elastic recoil detection, an analytical technique in materials science
- Emergency repair disk, aka Microsoft ERD (also see ERD Commander).
- Emergency Reserve Decoration, a UK Army medal
- Episcopal Relief and Development, the international relief and development agency of the Episcopal Church
- Evolutionary Rapid Development, a software development process
- Extended reach drilling, a form of directional drilling
- Entity-relationship diagram, a model of relationships between database tables
- Emotional regulation disorder, another word for borderline personality disorder