The University of Idaho (officially abbreviated U of I, or UIdaho) is the U.S. state of Idaho’s oldest public university and is based in Moscow. The university offers 142 degree programs, from accountancy to wildlife resources, including bachelor’s, master’s, doctoral, and specialists’ degrees. Certificates of completion are offered in 30 areas of study.

From 1896 through May 2011, the University of Idaho granted 80,233 bachelor’s degrees, 21,734 master’s degrees, 2,694 doctoral degrees, 240 honorary degrees, 1,164 specialist degrees, and 3,654 law degrees.The university is organized into ten colleges; two are exclusively for graduate students (Law & Graduate Studies).

In July 2002, the College of Letters & Science was split into two separate colleges: the College of Science and the College of Letters, Arts, and Social Sciences (CLASS). Concurrently, the College of Mines and Earth Resources was discontinued; its programs were split between the College of Engineering and the new College of Science.

The College of Law opened a second campus in Boise in 2010. Initially, the Boise campus only offered third-year classes. It expanded to offer second-year classes in 2014, and as of 2017–18, law students can take their entire three-year curriculum at either location.

• College of Agricultural and Life Sciences – (renamed 2001, formerly Agriculture (1901))
• College of Art and Architecture – (1981)
• College of Business and Economics – (1925)
• College of Education – (1920)
• College of Engineering – (1911)
• College of Graduate Studies
• College of Law – (1909)
• College of Letters, Arts, and Social Sciences – (2002, formed after split of Letters and Science (1900))
• College of Natural Resources – (renamed 2000, formerly Forestry, Wildlife, & Range Sciences, originally Forestry (1917))
• College of Science – (2002, formed after split of Letters and Science, and dissolution of Mines and Earth Resources)