Hagen is the name of some different cities in Europe.
- Hagen (NRW), a city in North Rhine-Westphalia
- Hagen am Teutoburger Wald near Osnabrück
- Hagen im Bremischen in the north of Lower Saxony
- Hagen (Holstein) in Schleswig-Holstein
- Hagen (Moselle), a village in the Département Moselle