St. Elmo Society, or Elmo's, is a secret society for seniors at Yale University. It was founded in 1889 as part of the national fraternity, Delta Phi. St. Elmo's is a member of the “ancient eight consortium” which includes the seven other original societies at Yale: Skull and Bones, Scroll and Key, Berzelius, Wolf's Head, Book and Snake, Elihu, and Mace and Chain.