The university opened in the fall of 1968, as a freshman-sophomore campus as part of the
University of Wisconsin Colleges system. The university is jointly owned by the UW system,
Sauk County, and
City of Baraboo. Circa the mid-to-late 20th century
West Baraboo did not financially contribute to UW–Baraboo. A new science building was built in 2015, named in honor of former dean Thomas C. Pleger. In 2017 the six tennis courts of Baraboo High were in disrepair because of soil conditions, with two of the courts severely damaged. At that time the district was discussing with UW–Baraboo the possibility of having new tennis courts built on the college property with the district sharing the courts; the college would have eight courts, with the district building four of them. Prior to July 1, 2018, UW–Baraboo/Sauk County was one of 13 freshman-sophomore liberal arts transfer campuses of the UW Colleges, and offers a general education associate degree. After beginning their studies at UW–Platteville Baraboo Sauk County, students transfer to other UW System institutions as well as to colleges and universities throughout the country to complete their
bachelor's degrees. In 2013, the college had an average class size of 22.5 students. On July 1, 2018, the campus formally merged with UW–Platteville, a four-year comprehensive university that is part of the University of Wisconsin System. At that time it received its current name. ==Campus==