USS

USS may refer to:

organizations:
 * Union of Secondary Students, a student-rights advocacy group in Ireland
 * Union Switch & Signal, a supplier of railroad switching equipment
 * Union Syndicale Suisse, the Swiss Trade Union Confederation
 * United Seamen's Service
 * United States Senate
 * United States Steel Corporation
 * USA Swimming, formerly United States Swimming, the national governing body for competitive swimming in the US

In computing:
 * Unformatted System Services, the mechanism within VTAM to format a terminal's initial screen and route to selected applications
 * Informally, and arguably incorrectly, UNIX System Services, a component of z/OS
 * Upload Speed Sense, a method of regulating a host's upload bandwidth in the eMule client

USS may also refer to:
 * Ubiquitous Synergy Seeker, a Canadian band
 * Ultrasound Scan, a scientific and medical diagnostic technique
 * United Star Ship or United Space Ship, as a ship prefix in the Star Trek franchise
 * United States Ship, typically as a ship prefix in the United States Navy (includes submarines)
 * United States Standard, an older standard of screw thread
 * Universal Spinal System, an implantable device (instrumentation) for correcting a spine exhibiting scoliosis
 * Universities Superannuation Scheme, a pension scheme in the United Kingdom
 * Uxbridge Secondary School, a high school in Uxbridge, Ontario, Canada
 * Union of Sovereign States, the planned successor to the Soviet Union
 * Universal Studios Singapore
 * University of Southern Somalia