UIS may refer to:

Uis, a village in Erongo Region, Namibia Underwater Inspection System, a component of the Underwater Port Security System developed for the United States Coast Guard Universal Interactive Studios (now Vivendi Games) University of Illinois Springfield, a public four-year university in the United States Universidad Industrial de Santander, Colombia University of Stavanger, a public research university in Norway Union Internationale de Spéléologie, an international umbrella organization for caving and speleology Unisys Corporation NYSE stock symbol UIs, plural abbreviation of user interface Uisai language, ISO 639-3 code Umpire Information System, made by QuesTec and used for providing feedback and evaluation of Major League umpires UNESCO Institute for Statistics

See also UI (disambiguation)