Mackay Hall, placed on the National Register of Historic Places, houses the University's administrative offices, as well as classrooms. It was started in 1886 with the help of students who quarried the stone from the school's land, carried it to the site and helped to build the structure as a means of earning their tuition. With its clock tower overlooking the residence halls, classrooms and other more modern facilities around it, Mackay Hall has become the symbol of the University.
As of 2018, it has a total undergraduate enrollment of 18,700. Its setting is suburban, and the campus size is 700 acres. Park University is regionally accredited by the North Central Association of Colleges and Schools (NCA) and is a member of the Council of Independent Colleges and the Independent Colleges and Universities of Missouri.