Belhadj or Belhaj may refer to:
Abdelhakim Belhadj (born 1966), the emir of the Libyan Islamic Fighting Group Ahlem Belhadj (1964–2023), Tunisian psychiatrist and activist Ali Belhadj (born 1956), Vice-President of the Islamic Salvation Front in Algeria (born 1960), Moroccan politician Nadir Belhadj (born 1982), footballer