For the numerical prefix uni- and words related to it see Wiktionary.

Uni may refer to:

• uni-ball, and uni are brands of pens and pencils made by the Mitsubishi Pencil Company
• Uni (mythology), the supreme goddess of the Etruscan mythology
• A short form for University
• University Professors Program, an interdisciplinary program for gifted students at Boston University
• The Japanese name for sea urchin eaten as sushi
• Uni, a Neopet in the form of a unicorn
• The character Uni in Dungeons & Dragons (TV series), voiced by Frank Welker
• Uni Records, Universal City Records, a division of MCA
• Uni (urban-type settlement), an urban-type settlement in Kirov Oblast, Russia
• UNI (language), a constructed language
• In mathematics, the category of uniform spaces
• University High School (Irvine, California), a high school located in Irvine, California

The acronym UNI or Uni can stand for:

• Ente Nazionale Italiano di Unificazione
• Union Nationale Inter-universitaire, a French right-wing union of university students
• Union Network International
• Unity Railways (AAR reporting mark UNI)
• Universidad Nacional de Ingenieria (Lima, Peru)
• University of Northern Iowa
• Universidade Independente, in Lisbon, Portugal
• United News of India
• User-Network Interface