| Region: | Turkestan, Transoxiana (Central Asia) |
| Era: | Islamic Golden Age |
| Siraj al-Din al-Ushi Arabic: سراج الدين الأوشي | |
| Imam al-Haramayn ("the Imam of the two Sanctuaries") | |
| Birth Place: | Osh, Kyrgyzstan |
| Death Date: | 575 A.H. = 1179–80 A.D. |
| Religion: | Islam |
| Denomination: | Sunni |
| Jurisprudence: | Hanafi |
| Creed: | Maturidi |
| Main Interests: | Aqidah, Kalam (Islamic theology), Fiqh (Islamic jurisprudence), Hadith studies |
| Notable Works: | Bad' al-Amali, Al-Fatawa al-Sirajiyyah |
| Influences: | Abu Hanifa Abu Mansur al-Maturidi Najm al-Din 'Umar al-Nasafi |
| Influenced: | Ali al-Qari 'Izz al-Din ibn Jama'ah Ibn Nujaym Ibn 'Abidin Al-Haskafi Ibn Qutlubgha |
Siraj al-Din 'Ali ibn 'Uthman al-Ushi al-Farghani (Arabic: سراج الدين علي بن عثمان الأوشي الفرغاني) was a Hanafi jurist, Maturidi theologian, hadith expert (muhaddith), Chief Judge or Supreme Judge (Qadi al-Qudah or 'Aqda al-Qudah as he was also called), and researcher who has ferreted out facts and established them (muhaqqiq).[1] He is probably best known for his work on a confession of faith in rhyme entitled al-Qasida al-Lamiyya fi al-Tawhid, also called Bad' al-Amali or from the opening words Qasidat Yaqulu al-'Abd.[2]
He was born or lived in Osh (Ush), by the Ferghana Valley (Ush in today's Kyrgyzstan) and hence his demonym al-Ushi.[3]
His well known writings include:[4]
He died at the end of the 6th /12th century,[6] after 569 AH (1173/4 AD), specifically in 575/1179–80.[7]