Bibas or Peppas (Arabic: بيباص; Greek: πέππας; Hebrew: ביבאס) is a Greek surname derived from the word παππάς or παπάς, meaning priest. The surname is used in Greece and various places in the Mediterranean, such as in Libya and in Israel.

In Israel, the surname exists with Jewish families of Greek origin.

In Libya, due to the influence of Greek in the local dialect, persons are sometimes nicknamed Bibas, owing largely to their similarity in appearance to the "peppas," the so-called Christian priests. The name has, therefore, become a surname used by extended families, including by some residents in Janzur, as also used in other places in Libya, as well as in Tunisia and Algeria.

A community of ex-patriots with the surname currently reside in the United States.

People with the surname

Notable people with the surname include:

• Christos Peppas
• Haim Bibas
• James Pipas, American virologist
• June Peppas
• Nicholas A. Peppas
• Stephanos Bibas
• Yehuda Bibas