Härjedalen is the name of a geographical region in Sweden which can refer to:
- Herdalia, or Härjedalen - a historical Province of Sweden
- Härjedalen Municipality, or Härjedalens kommun - a current Municipality of Sweden
- Jämtland County, or Jämtlands län - a current County of Sweden
- Hudiksvall County, or Hudiksvalls län - a former county
- Norrland County, or Norrlands län - a former county