FDN
FDN stands for:
- Frente Democrático Nacional Left-wing political alliance for the Mexican presidential election in Mexico in 1988
- Friends of the primitive peoples (FdN), German section of Friends of Peoples Close to Nature (fPcN)
- Fixed dialing number , an option in cellular communications
- Fórum Demokrátiku Nasionál , an East Timorese party alliance
- Darmstadt Nord train station (DS100 code)