RDL stands for:
- National Federation of German aerospace industry
- Radio Dreyeckland (Freiburg), a non-commercial radio stations in Germany, based in Freiburg im Breisgau
- Radio Dreyeckland Libre, an alternative radio station from Colmar in France
- Report Definition Language, an XML-based schema for defining database reports
- Reservists providing a service in the Armed Forces, see reservists service
- Right of Agriculture, a journal of agricultural and agri-environmental law.