Mufaddal or Mofazzal is an Arabic name. People with this name include:

• al-Mufaddal al-Dabbi (died c. 780–787), Arabic philologist of the Kufan school
• al-Mufaddal ibn Umar al-Ju'fi (died before 799), early Shi'i / ghulat leader and close confidant of Ja'far al-Sadiq (died 765)
• Athir al-Din al-Abhari, al‐Mufaddal ibn Umar ibn al‐Mufaddal al‐Samarqandi al‐Munajjim (died 1265 or 1262), Iranian astronomer and mathematician
• al-Mufaddal ibn Abi al-Fada'il, 14th-century Coptic Christian historian from Egypt

• Mufazzal Haider Chaudhury (1926–1971), Bengali essayist and linguist
• Mufaddal Saifuddin (born 1946), spiritual leader and 53rd Da'i Mutlaq of the Dawoodi Bohras, a subgroup of the Ismaili Shia branch of Islam
• Mofazzal Hossain Chowdhury (born 1948), Bangladeshi government minister
• Kazi Shah Mofazzal Hossain Kaikobad (born 1956), Bangladeshi politician
• Kazi Mofazzal Hossain Shaikat (born 1986), Bangladeshi footballer
• Muhammad Mofazzal Hossain Master, Bangladeshi politician

• Mufaddaliyat, 8th-century anthology of ancient Arabic poems compiled by al-Mufaddal al-Dabbi
• Tawhid al-Mufaddal, 9th-century work falsely attributed to al-Mufaddal ibn Umar al-Ju'fi