Ziad Samir Jarrah (Arabic: زياد سمير جراح, Ziyād Samīr Jarrāḥ; May 11, 1975 – September 11, 2001) was a Lebanese and one of the perpetrators of the September 11 attacks. He was the hijacker-pilot of United Airlines Flight 93, crashing the plane into a field in a rural area near Shanksville, Pennsylvania—after a passenger uprising—as part of the coordinated attacks.

After a wealthy and secularist upbringing, Jarrah moved to Germany in 1996. He became involved in the planning of the September 11 attacks while attending Hamburg University of Applied Sciences (HAW) in the late 1990s, meeting Mohamed Atta, Marwan al-Shehhi and Ramzi bin al-Shibh, forming what is now known as the Hamburg cell. Jarrah was recruited by Osama bin Laden for the attacks in 1999. Unique among the hijackers, he was close to his family and girlfriend. He was reportedly the only hijacker who had any significant apprehensions about carrying out the attacks. His family and friends continue to deny his association with the attacks.

Jarrah arrived in the United States in June 2000. He trained at Huffman Aviation together with Atta and Al-Shehhi with their flight instructor Rudi Dekkersfrom June 2000 to January 2001, after relocating to Florida from New Jersey.

On September 7, 2001, Jarrah flew from Fort Lauderdale to Newark. Four days later, he boarded United Airlines Flight 93, and was believed to have taken over as the pilot of the aircraft along with his team of hijackers, which included Saeed al-Ghamdi, Ahmed al-Nami and Ahmed al-Haznawi, who together made an attempt to crash the plane into either the United States Capitol or the White House, which was thwarted when the passengers started a revolt against the hijackers.