Mosiah may refer to:

  • King Mosiah I, in Mormon literature, king of a tribe of Nephites before 130 BC
  • King Mosiah II, in Mormon literature, king of the Nephite nation from about 124 BC to 91 BC
  • Book of Mosiah, a book of Book of Mormon, named after King Mosiah II
  • Mosiah priority, a theory about the creation of the Book of Mormon
  • Sons of Mosiah, the collective name used in the Book of Mormon for the four sons of King Mosiah