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
• University of Illinois at Springfield, United States
• Universidad Industrial de Santander, Colombia
• University of Stavanger, 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

The University of Stavanger (UiS) is a university located in Stavanger, Norway and established in 2005. It has about 8,500 students and 1200 administration, faculty and service staff. It is organised in three faculties, including two national centres of expertise. The university employs 107 professors. The university offers doctorates in Petroleum Technology, Offshore Technology, Computer Science, Electrical Engineering, Special Needs Education, Literacy and Social Science (with specializations in Medicine and Health, Risk Management and Societal Safety, Management, Economics, Tourism, Sociology, Social Work and Culture & Society).