Abu Omar may refer to:
- Abu Abdullah al-Rashid al-Baghdadi (died 2010), also known as Abu Omar al-Baghdadi, Iraqi insurgent
- Abu Omar al-Kurdi, real name Sami Muhammad Ali Said al-Jaaf, bomb maker who worked in Iraq
- Abu Qatada, sometimes called Abu Omar, Jordanian militant living in England
- Ahmed Ali Ahmed, also known as Abu Omar, former leader of al-Qaeda in Iraq
- Hassan Mustafa Osama Nasr, also known as Abu Omar, Egyptian cleric kidnapped in Milan by the CIA in 2003
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