High Quality Content by WIKIPEDIA articles! The University of Denver (DU), founded in 1864, is the oldest private university in the Rocky Mountain Region of the United States. The University of Denver is a coeducational, four-year university in Denver, Colorado. DU currently enrolls approximately 5,000 undergraduate students and 6,000 graduate students. The 125-acre (0.51 km2) main campus is a designated arboretum and is located primarily in the University Neighborhood, about seven miles (11 km) south of downtown Denver.