Propagation can refer to:
- Reproduction, and other forms of multiplication or increase
- Plant propagation, the production of more plants by seeds, cuttings, grafting or other methods
- Propagation of schema, in artificial reproduction
- Wave propagation, The motion of a wave throughout a medium or the transfer of its energy
- Radio propagation, the application of wave propagation to radio communications
- Software propagation, the distribution of free software in a manner explicitly permitted under the applicable license
- Propaganda