Dedan may refer to:
- Dedan, an ancient Arabian city-state located in the oasis of al-ʿUla
- for the kingdom in its later phase, see Lihyan
- for the city in the Bible, see Dedan (Bible)
- Dedan State, a former princely state in Gujarat, western India
- Dedan Kimathi, a leader of the Kenyan Mau Mau revolt
- Dedan, a major antagonist of the independent video game Off.