| Phi Delta Phi | |
|---|---|
| ΦΔΦ | |
 | |
| Founded | December 13, 1869 University of Michigan Law School |
| Type | Honor society (formerly professional fraternity until 2012) |
| Affiliation | Independent |
| Former Affiliation | PFA |
| Status | Active |
| Scope | International |
| Motto | "Friends of Justice and Wisdom" |
| Colors | Garnet and Pearl Blue |
| Symbol | Owl and Skull |
| Flower | Jacqueminot Rose |
| Publication | The Brief |
| Chapters | 131 |
| Members | 200,000+ lifetime |
| Headquarters | 1426 21st Street NW Washington, DC 20036-5947 United States |
| Website | www |
Phi Delta Phi (ΦΔΦ), commonly known as Phid or PDP, is an international legal honor society and the oldest legal organization in continuous existence in the United States. Founded in 1869 at the University of Michigan as a professional fraternity, it was designated as an honor society in 2012. It is considered among the world's most prestigious professional organizations.[citation needed]
Phi Delta Phi is organized by two branches: legal honor societies and pre-law societies. The legal honor societies, called Inns, are located at law schools. The pre-law societies, called Halls, are for undergraduate membership at U.S. colleges and universities.
With a total membership of over 200,000 people, members of Phi Delta Phi include five U.S. presidents, two U.S. vice presidents, 14 Supreme Court justices, and numerous members of Congress, Cabinet members, and ambassadors.