Begum (also begüm, bagum, begom, begam, baigum or beygum) is a royal and aristocratic title from Central and South Asia. It is the feminine equivalent of the title baig or bey, which in Turkic languages means "higher official". It usually refers to the wife or daughter of a beg. The related form begzada (daughter of a beg) also occurs.

In South Asia, particularly in Delhi, Hyderabad, Sindh, Punjab, Afghanistan, Khyber Pakhtunkhwa and Bengal, begum has been adapted for use as an honorific for Muslim women of high social status, accomplishment, or rank, as in English language the title "Lady" or "Dame" is used. The honorific may either precede or follow the proper name of the woman.