Adam Yahiye Gadahn (Arabic: آدم يحيى غدن‎, born Adam Pearlman, September 1, 1978) is an American-born English-speaking senior operative, cultural interpreter, spokesman and media advisor for the Islamist terrorist group Al-Qaeda.

Since 2004, he appeared in a number of videos produced by Al-Qaeda as "Azzam the American" ('Azzām al-Amrīki, عزام الأمريكي, sometimes transcribed as Ezzam Al-Americee). He is believed to have inspired bin Laden's September 2007 video.

In 2004, he was added to the FBI Seeking Information - War on Terrorism list. On October 11, 2006 he was removed from that list, and placed on the Bureau of Diplomatic Security Rewards for Justice Program list of wanted criminals. On the same day, Gadahn was indicted based on the testimony of the FBI case agent E.J. Hilbert II, in the Southern Division of the United States District Court for the Central District of California by a federal grand jury for the capital crime of treason for aiding an enemy of the United States (i.e. Al-Qaeda). Gadahn is the first American charged with treason since Tomoya Kawakita in 1952.