Jahiliyyah (Arabic: جاهلية‎ ǧāhiliyyah/jāhilīyah "ignorance") is an Islamic concept of "ignorance of divine guidance" or "the state of ignorance of the guidance from God" or "Days of Ignorance" referring to the condition in which Arabs found themselves in pre-Islamic Arabia, i.e. prior to the revelation of the Quran to Muhammad. The root of the term jahiliyyah is the I-form verb yajhalu "to be ignorant or stupid, to act stupidly". By extension, it has come to refer to the state of anyone not following Islam and the Quran.

The term jahiliyyah is used several places in the Quran, and translations often use various terms to represent it:

3:154 Then, following misery, He sent down upon you a feeling of security, a slumber overcoming a party among you, while another party cared only for themselves, thinking false thoughts about God, thoughts fit for the Age of Idolatry. 5:50 Do they truly desire the law of paganism? But who is fairer than God in judgment for a people firm of faith? 33:33 Remain in your homes, and do not display your adornments, as was the case with the earlier Age of Barbarism. 48:26 For the unbelievers had planted in their hearts a zealotry, the zealotry of lawlessness ...