Abū Yūsuf Yaʻqūb ibn ʼIsḥāq aṣ-Ṣabbāḥ al-Kindī (/ælˈkɪndi/; Arabic: أبو يوسف يعقوب بن إسحاق الصبّاح الكندي; Latin: Alkindus; c. 801–873 AD) was an Arab polymath of the Islamic Golden Age. He was the first of the Islamic peripatetic philosophers, and is hailed as the "father of Arab philosophy".

Al-Kindi was born in Kufa and educated in Baghdad, Iraq.
He became a leading figure in the House of Wisdom (Bayt al-Hikma), the Abbasid centre for translation and scholarship. There he led the Kindi Circle, an intellectual group of translators, editors, philosophers, physicians, mathematicians, and scholars. He served as a scholar under the caliph al-Ma'mun and was later associated with the courts of al-Mu'tasim and al-Wathiq. They appointed him to oversee the translation of Greek scientific and philosophical works into Arabic. This direct engagement with "the philosophy of the ancients" — especially Neoplatonic and Peripatetic thought — profoundly shaped his ideas, leading him to synthesize, adapt, and promote these traditions within the Muslim world.
He subsequently wrote hundreds of original treatises on subjects ranging from metaphysics, ethics, logic, psychology, and music to medicine, pharmacology, mathematics, astronomy, astrology, and optics, and further afield to practical topics such as perfumes, swords, jewels, glass, dyes, zoology, tides, mirrors, meteorology, and earthquakes.
The central theme underpinning al-Kindi's philosophical writings is the compatibility between philosophy and other "orthodox" Islamic sciences, particularly theology, and many of his works deal with subjects in which theologians had an immediate interest. These include nature of God, the soul, and prophetic knowledge. While he was an independent philosopher rather than a traditional theologian (kalam), his work flourished under the same Abbasid patronage that favored Mu'tazilism, and his philosophical positions closely mirrored Mu'tazilite doctrines, including regarding the creation of the Qur'an.
Like Muslim philosophers after him, such as al-Farabi, Ibn Sina (Avicenna), Ibn Rushd (Averroes), Nasir al-Din al-Tusi and Mulla Sadra, al-Kindi conversed about philosophical issues without any regard to sectarian issues.
Al-Kindi lost favour under al-Mutawakkil, who sought to restore orthodoxy as articulated by Ahmad ibn Hanbal. The Kindian tradition, however, continued into the 10th century CE, carried forward by first‑ and second‑generation students of al-Kindi. Through this transmission, his Neoplatonic and early Arab-Islamic Aristotelian ideas also reached early medieval Jewish thinkers. Scholars describe a form of "Jewish Kindism", in which Medieval Jewish philosophers drew on ideas circulating through al-Kindi's Arabic and Christian Arabic followers.
"Al-Kindism" (Arabic: الكَندِيّة) is a modern intercultural curriculum idea that views al-Kindi as an intercultural educator. It uses interculturalism, interdisciplinary work, philosophy, theology, and intercultural dialogue, and teaches that intercultural learning is essential for true knowledge in the Arabic intellectual tradition.