| Delta Phi | |
|---|---|
| ΔΦ | |
 | |
| Founded | November 17, 1827 Union College |
| Type | Social |
| Affiliation | NIC |
| Status | Active |
| Scope | National |
| Motto | Semper Ubique ("Always Everywhere") |
| Colors | Columbia blue and White |
| Symbol | Maltese Cross |
| Patron saint | St. Elmo |
| Chapters | 12 active |
| Nickname | St. Elmo , St. Elmo Hall, Elmo |
| Headquarters | 120 Providence Road, Suite 102 P.O. Box 4633 Chapel Hill, North Carolina 27514 United States |
| Website | www |
Delta Phi (ΔΦ) is a fraternal society established in Schenectady, New York, on November 17, 1827. Its first chapter was founded at Union College, and was the third and final member of the Union Triad. In 1879, William Raimond Baird's American College Fraternities characterized the fraternity's membership as being largely drawn from the old Knickerbocker families of New York and New Jersey.
As of 2024, the fraternity has ten active chapters on the East Coast of the United States, and also uses the names "St. Elmo," "St. Elmo Hall," and "Elmo" in reference to its relation to Erasmus of Formia, the patron saint of sailors, and the Knights of Malta.