The University of Wisconsin–Whitewater (UW–Whitewater or UWW) is a public university in Whitewater, Wisconsin, United States. It is part of the University of Wisconsin System. As of fall 2024, the university offers 47 undergraduate majors and 13 graduate programs and enrolls approximately 11,000 students. Approximately 1,400 faculty and staff are employed by the university, and the student body consists of individuals from about 40 US states and 30 countries. UW–Whitewater operates the University of Wisconsin–Whitewater at Rock County, a two-year branch campus in Janesville, Wisconsin.

On April 21, 1868, the school was named "Whitewater Normal School" and graduated its first class of teachers in June 1870.

A unique tradition of the school was known as "Students' Day." One day during the term, faculty would, unannounced, be entirely absent. Once students recognized that the day must be "Students' Day", they would elect a President and Faculty from amongst themselves who would take up the regular duties of the day. The annual catalogue stated the purpose of "Students' Day" as the following: "The object of thus putting the institution under the care of the students is to test their moral culture, their executive ability, and their devotion to their work."

In 1927, the school received authority to grant baccalaureate degrees in education and its name was changed to "Whitewater Teachers College". With the addition of the liberal arts programs in 1951 it became "Wisconsin State College–Whitewater", and was later designated a Wisconsin State University in 1964, the "Wisconsin State University–Whitewater".

In 1971, after the merger of the former University of Wisconsin and the former Wisconsin State Universities, the school became part of the University of Wisconsin System and has been called the "University of Wisconsin–Whitewater" since.

The University of Wisconsin–Whitewater encompasses 400 acres (160 ha) in southeastern Wisconsin. The landmark of the university's campus, Old Main, was destroyed by fire on February 7, 1970. The school's oldest building, it was the only one that had been part of the original campus. The east wing of Old Main, now called Hyer Hall, is all that remains of the building. It houses many of the university's administrative offices, in addition to classrooms and lecture halls. After the fire that destroyed Old Main, the building's carillon bell was removed and installed in front of the Alumni Center. Now, an electronic carillon bell rings regularly throughout the day.

The James R. Connor University Center occupies the heart of campus. The "UC" contains a bowling alley, an art gallery, a stage for live music, a coffee shop, and several dining options. Young Auditorium, the largest performing arts venue on campus, hosts dance, music, theatre, comedy, and other university events. The UW-Whitewater Nature Preserve is located in the northeast corner of campus and consists of 110 acres of various ecosystems such as woodlands, wetlands, and prairie. In addition to serving as an outdoor classroom and laboratory, the preserve includes recreational trails for running, hiking, cross-country skiing, or biking.

The University of Wisconsin–Whitewater has over 180 recognized student clubs and organizations.