HLSS

HLSS can refer to:


 * Half-Life Sound Selector, a program that allows users to play audio files using voice communication on games developed by Valve.
 * Heart Lake Secondary School, a high school in Brampton, Ontario, Canada
 * Hopscotch Lollipop Sunday Surprise, a 2001 album by The Frogs
 * School of Humanities, Languages and Social Sciences (UWE), Bristol