| Phi Kappa Sigma | |
|---|---|
| ΦΚΣ | |
 | |
| Founded | October 19, 1850 University of Pennsylvania |
| Type | Social |
| Affiliation | NIC |
| Status | Active |
| Scope | North America |
| Mottos | Stellis Aequus Durando (“Equal to the Stars in Endurance”) |
| Slogan | Once a Phi Kap, Always a Phi Kap Brotherhood is More Than Skin Deep Men of Honor Since 1850 |
| Colors | Black Old Gold |
| Symbol | Maltese Cross |
| Flag |  |
| Flower | Yellow Chrysanthemum |
| Publication | Maltese Cross |
| Philanthropy | Leukemia & Lymphoma Society |
| Chapters | 42 |
| Colonies | 3 |
| Members | 1,500 active 35,000+ lifetime |
| Nickname | Skulls |
| Headquarters | 716 Adams St Carmel, Indiana 46032 United States |
| Website | pks.org |
Phi Kappa Sigma (ΦΚΣ), also known as Phi Kap, Skulls, Skullhouse, or PKS, is an international all-male college secret society and social fraternity. Commonly known as “Skulls”, the name is inspired by the skull and crossbones on the fraternity's badge and coat of arms. Members are often recognized by the solid gold membership pin depicting the fraternity’s symbol, a Maltese Cross surrounding a human skull.