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