| Alī ibn ʿĪsā al-Asṭurlābī | |
| Native Name: | علي بن عيسى |
| Native Name Lang: | ar |
| Birth Date: | before 858 |
| Era: | Islamic Golden Age |
| Main Interests: | Geography, astronomy |
ʿAlī ibn ʿĪsā al-Asṭurlābī (ar|علي بن عيسى, fl. 832) was a 9th century Arab geographer and astronomer. He wrote a treatise on the astrolabe and was an opponent of astrology. During the reign of al-Ma'mun, and together with Khālid ibn ʿAbd al-Malik al-Marwarrūdhī, he participated in an expedition to the Plain of Sinjar to measure the length of a degree. Differing reports state that they obtained a result of, 56 and two-thirds, or 56 and one-quarter miles per degree.