Abu'l-Fadl, Abu al-Fadl, or Abu'l-Fazl or Abolfazl or Abul al-Fadhl, that means "father of virtue", may refer to different people or places:
- Abu al-Fadl al-Abbas
- Mírzá Abu'l-Fadl (1844-1914), an eminent Bahá'í scholar.
- Abul Fazal, Bangladeshi writer
- Abderrahmane of Morocco aka Abu al-Fadl `Abd ar-Rahman, Sultan of Morocco (1822-1859)
- Abu'l-Fazl ibn Mubarak, the 16th century vizier of the great Mughal emperor Akbar, and the author of Akbarnama
- Abu al-Fadl Abu al-Wahid al-Tamīmī, part of the chain of leadership in the Qadiriyyah order of Sufism.
- Abu al-Fadl (village), an Arab village, depopulated during the 1948 Arab-Israeli war.