Sias

Sias or SIAS may refer to:
 * Sias, West Virginia, unincorporated community in Lincoln County, West Virginia, United States
 * Sias International University, a private college affiliated with Zhengzhou University in Henan Province, People's Republic of China
 * Some Institutes for Advanced Study

People with the surname

 * David Sias (born 1987), American soccer player
 * Don E. Sias (died 1934), American politician

SIAS

 * Social Interaction Anxiety Scale, a self-report scale that measures distress when meeting and talking with others
 * Spina iliaca anterior superior, medical Latin term for the Anterior superior iliac spine
 * Student Investment Advisory Service, student managed investments fund and part of Simon Fraser University
 * Serviciul pentru Intervenții și Acțiuni Speciale, a task force of the Romanian Police