| Religion: | Islam |
| Al-Juzajani | |
| Al-Hafiz | |
| Birth Date: | around 796 CE/180 AH Jowzjan |
| Death Date: | 872 CE/259 AH Damascus |
| Region: | Middle Eastern Scholar |
| Maddhab: | Hanbali |
| School Tradition: | Sunni |
| Main Interests: | Hadith |
| Influences: | Ibn Ma'in, Ahmad ibn Hanbal, Ali ibn al-Madini, Ishaq Ibn Rahwayh |
| Influenced: | Abu Dawood, al-Tirmidhi, al-Nasa'i, Abu Hatim al-Razi |
Abu Ishaq Ibrahim ibn Ya'qub ibn Ishaq al-Sa'di al-Juzajani (Arabic: أبو إسحاق إبراهيم بن يعقوب بن إسحاق السعدي الجوزجاني , born around 796 CE/180 AH – died 872 CE/259 AH) was a Muslim hadith scholar, one of the imams of al-jarh wa al-ta'deel and a student of Ahmad ibn Hanbal. Some of the hadith scholars who transmitted his narrations include Abu Dawood, al-Tirmidhi and al-Nasa'i.
He was born and raised in Jowzjan (now a province in Afghanistan) but moved to Damascus where he lived until his death.
Some of his notable teachers were: Ibn Ma'in, Ahmad ibn Hanbal, Ali ibn al-Madini, Ishaq Ibn Rahwayh, Abu Thawr al-Kalbi, Hafs ibn ‘Umar al-Hawdi, Husayn ibn ‘Ali al-Ju'fi, Sa'id ibn Abi Maryam, Sa'id ibn Mansoor, Musadad ibn Masrahad and Yazid ibn Haroon.
The well-known students who took knowledge from him were: Abu Dawood, al-Tirmidhi, al-Nasa'i, Abu Hatim al-Razi, Abu Zur'ah al-Razi, Abu Zur'ah al-Dimashqi and al-Dulabi.
The following is a list of works by al-Juzajani: