Ghadir or Ghadeer (Arabic: غدير) means moving body/object or small stream/river in Arabic. It may refer to:

• Ghadir, a village in Keserwan District, Lebanon
• Ghadir-e Sab, a village in Khuzestan Province, Iran
• Ghadir Kuhi, a village in Hormozgan Province, Iran
• Ghadir Saberi, a village in Hormozgan Province, Iran
• Qaleh-ye Ghadir, a village in Khuzestan Province, Iran
• Shahrak-e Ghadir, a village in Fars Province, Iran
• Ghadir Bridge, a bridge in Esfahan city over the Zayandeh River, Iran
• Ghadir Khumm, the location of Event of Ghadir Khumm, a sacred site in Saudi Arabia
• A former village in Aden, now Yemen

• Ali Ghadeer (born 1971), Iraqi writer and journalist
• Mohammad Ghadir (born 1991), Israeli Arab footballer
• Ghadir Ghroof-Gharid (born 1990), Palestinian track and field athlete
• Ghadir Razuki (fl. 1983–2000), British-Iraqi businessman

• Ghadir (missile), an Iranian anti-ship cruise missile
• Ghadir (submarine), a class of midget submarines built by Iran
• Ghadir River, a river in Lebanon
• Al-Ghadir, a book by Iranian Shia scholar Abd Al Husayn Amini
• Eid al-Ghadeer, a festival commemorating Muhammad's last sermon
• Event of Ghadir Khumm, where Muhammad announced Ali as his successor

• Kader (disambiguation)