YSS (disambiguation)

YSS is Young–Simpson syndrome, a rare congenital disorder.

YSS may also refer to:
 * Yogoda Satsanga Society of India, a non-profit nonsectarian spiritual organization
 * Yorkshire Subterranean Society, a caving club
 * Young Scottish Socialists, the youth wing of the Scottish Socialist Party
 * Yengema Secondary School, Sierra Leone
 * Yishun Secondary School, Singapore