Sidi is a masculine title of respect, meaning "my master" in Darija and Egyptian Arabic (sayyid in other dialects) equivalent to modern popular usage of the English Mr.. It is also used in other Arabic dialects, such as Eastern Arabic, as well as by Muslims of the Indian subcontinent in the Urdu language; however, in these latter two cases, "Sidi" does not have so much currency as titles like sayed, janab or saheb.

Occasionally a respected member of a Muslim society will be given the title Sidi by default in recognition of upright standing and wisdom. This especially applies to marabouts, hence the term appears in places and mosques named after one.

In the Maghrebi kingdom of Morocco:

Sidi is an Arabic honorific.

Sidi is part of the following proper names:

See also