Abdul (also transliterated as Abdal, Abdel, Abdil, Abdol, Abdool, or Abdoul; Arabic: عبد ال, ʿAbd al-) is the most frequent transliteration of the combination of the Arabic word Abd (عبد, meaning "Servant") and the definite prefix al / el (ال, meaning "the").

It is the initial component of many compound names, names made of two words. For example, عبد الحميد, ʿAbd el-Ḥamīd, usually spelled Abdel Hamid, Abdelhamid, Abd El Hamid or Abdul Hamid, which means "servant of The Praised" (God).

The most common use for Abdul by far, is as part of a male given name, written in English. When written in English, Abdul is subject to variable spacing, spelling, and hyphenation. It is a common name in the Middle East, North Africa, West Africa, East Africa, Central Asia, the Balkans, the Caucasus, and predominantly Muslim countries of South Asia and Southeast Asia. It is also sometimes used amongst African Americans and Turkic peoples of Russia.

The meaning of Abdul literally and normally means "Slave of the", but English translations also often translate it to "Servant of the".