| Ahmed Abdullah Al Masdoosi | |
| Pseudonym: | Masdoosi, M A Al |
| Birth Name: | Ahmad Abdullāh al- Masdūsī |
| Birth Date: | 1905 |
| Birth Place: | Mahboobnagar Hyderabad Deccan, India |
| Death Place: | Karachi, Pakistan |
| Occupation: | Islamic Research, Chart Maker, Map Making, Law |
| Nationality: | Hyderabad till 1948, then Pakistan |
| Period: | 1940–1967 |
| Subject: | Comparative Religion, Law, Humanity |
| Movement: | Bahadur Yar Jung Academy, Anjuman Khuddam Millat |
Ahmad Abdullāh al- Masdūsī (Arabic: احمد عبدالله المسدوسى ) was a Pakistani activist and lawyer. He was very active in social welfare, and community improvement activities.
He joined Malis-e-Ittehad-ul-Muslimeen in 1938. With the beginning of political career he gave up his legal practice and moved to Hyderabad. His villa was near the Mouzam Jahi Market. He was involved in the legal proceedings around the annexation of Hyderabad by India. He migrated to Karachi, in Pakistan, after the annexation. He authored several books including Living Religions of the World, a Socio-Political Study (1962)[1] and served as Professor of Law at Karachi University.