Hamza Salah Sa'id al-Ghamdi (Arabic: حمزة الغامدي, romanized: Ḥamza al-Ghāmdī; 18 November 1980 – 11 September 2001) was a Saudi terrorist hijacker.

Born in Saudi Arabia, Hamza al-Ghamdi left his family to fight in Chechnya and was probably sent to Al-Qaeda training camps in Afghanistan where he was chosen to participate in the 9/11 attacks.

In January 2001, al-Ghamdi rented a post office box in Delray Beach, Florida, with another hijacker, Mohand al-Shehri.

According to FBI director Robert Mueller and the 9/11 Commission however, al-Ghamdi did not first enter the United States until a London flight on 28 May with Mohand al-Shehri and Abdulaziz al-Omari.

On September 8 they checked out of the hotel, and moved into the Days Inn on Soldiers Field Road in Brighton, Boston, Massachusetts, where they remained up until the attacks.

[citation needed] On 22 September 2001, Arab News reported that Hamza al-Ghamdi's father told the Al Watan newspaper that an "FBI-released" photograph bore absolutely no resemblance to his son.